{{Elementbox_header | number=89 | symbol=Ac | name=actinium | left=[[radium]] | right=[[thorium]] | above=[[lanthanum|La]] | below=(Ute) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(227)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 6d<sup>1</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 18, 9, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 10 }}
{{Elementbox_meltingpoint | k=(circa) 1323 | c=1050 | f=1922 }}
{{Elementbox_boilingpoint | k=3471 | c=3198 | f=5788 }}
{{Elementbox_heatfusion_kjpmol | 14 }}
{{Elementbox_heatvaporiz_kjpmol | 400 }}
{{Elementbox_heatcapacity_jpmolkat25 | 27.2 }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | cubic face centered }}
{{Elementbox_oxistates | 3<br />(neutral oxide) }}
{{Elementbox_electroneg_pauling | 1.1 }}
{{Elementbox_ionizationenergies2 | 499 | 1170 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|195]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | no data }}
{{Elementbox_thermalcond_wpmkat300k | 12 }}
{{Elementbox_cas_number | 7440-34-8 }}
{{Elementbox_isotopes_begin | isotopesof=actinium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=225 | sym=[[actinium|Ac]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|10 days]] | dm=[[alpha decay|α]] | de=5.935 | pn=221 | ps=[[francium|Fr]] }}
{{Elementbox_isotopes_decay | mn=226 | sym=[[actinium|Ac]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|29.37 hours]] | dm=[[beta emission|β<sup>-</sup>]] | de=1.117 | pn=226 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=226 | sym=[[actinium|Ac]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|29.37 hours]] | dm=[[electron capture|ε]] | de=0.640 | pn=226 | ps=[[radium|Ra]] }}
{{Elementbox_isotopes_decay | mn=226 | sym=[[actinium|Ac]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|29.37 hours]] | dm=[[alpha decay|α]] | de=5.536 | pn=222 | ps=[[francium|Fr]] }}
{{Elementbox_isotopes_decay | mn=227 | sym=[[actinium|Ac]] | na=100% | hl=[[1 E_ s|21.773 years]] | dm=[[beta emission|β<sup>-</sup>]] | de=0.045 | pn=227 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=227 | sym=[[actinium|Ac]] | na=100% | hl=[[1 E_ s|21.773 years]] | dm=[[alpha decay|α]] | de=5.042 | pn=223 | ps=[[francium|Fr]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=90 | symbol=Th | name=thorium | left=[[actinium]] | right=[[protactinium]] | above=[[cerium|Ce]] | below=(Uqn) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[transition metal]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery white }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|232.0381(1)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 6d<sup>2</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 18, 10, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 11.7 }}
{{Elementbox_meltingpoint | k=2115 | c=1842 | f=3348 }}
{{Elementbox_boilingpoint | k=5061 | c=4788 | f=8650 }}
{{Elementbox_heatfusion_kjpmol | 13.81 }}
{{Elementbox_heatvaporiz_kjpmol | 514 }}
{{Elementbox_heatcapacity_jpmolkat25 | 26.230 }}
{{Elementbox_vaporpressure_katpa | 2633 | 2907 | 3248 | 3683 | 4259 | 5055 | comment= }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | cubic face centered }}
{{Elementbox_oxistates | 4<br />(weakly [[base (chemistry)|basic]] oxide) }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies4 | 587 | 1110 | 1930 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|180]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | no data }}
{{Elementbox_eresist_ohmmat0 | 147 n}}
{{Elementbox_thermalcond_wpmkat300k | 54.0 }}
{{Elementbox_thermalexpansion_umpmkat25 | 11.0 }}
{{Elementbox_speedofsound_rodmpsat20 | 2490 }}
{{Elementbox_youngsmodulus_gpa | 79 }}
{{Elementbox_shearmodulus_gpa | 31 }}
{{Elementbox_bulkmodulus_gpa | 54 }}
{{Elementbox_poissonratio | 0.27 }}
{{Elementbox_mohshardness | 3.0 }}
{{Elementbox_vickershardness_mpa | 350 }}
{{Elementbox_brinellhardness_mpa | 400 }}
{{Elementbox_cas_number | 7440-29-1 }}
{{Elementbox_isotopes_begin | isotopesof=thorium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=228 | sym=[[thorium|Th]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|1.9116 years]] | dm=[[alpha decay|α]] | de=5.520 | pn=224 | ps=[[radium|Ra]] }}
{{Elementbox_isotopes_decay | mn=229 | sym=[[thorium|Th]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|7340 years]] | dm=[[alpha decay|α]] | de=5.168 | pn=225 | ps=[[radium|Ra]] }}
{{Elementbox_isotopes_decay | mn=230 | sym=[[thorium|Th]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|75380 years]] | dm=[[alpha decay|α]] | de=4.770 | pn=226 | ps=[[radium|Ra]] }}
{{Elementbox_isotopes_decay | mn=232 | sym=[[thorium|Th]] | na=100% | hl=[[1 E_ s|1.405 E10 years]] | dm=[[alpha decay|α]] | de=4.083 | pn=228 | ps=[[radium|Ra]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=91 | symbol=Pa | name=protactinium | left=[[thorium]] | right=[[uranium]] | above=[[praseodymium|Pr]] | below=(Uqu) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[transition metal]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | bright, silvery metallic luster }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|231.03588(2)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 7s<sup>2</sup> 5f<sup>2</sup> 6d<sup>1</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 20, 9, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 15.37 }}
{{Elementbox_meltingpoint | k=1841 | c=1568 | f=2854 }}
{{Elementbox_boilingpoint | k=? 4300 | c=? 4027 | f=? }}
{{Elementbox_heatfusion_kjpmol | 12.34 }}
{{Elementbox_heatvaporiz_kjpmol | 481 }}
{{Elementbox_heatcapacity_jpmolkat25 | ??? }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | orthorhombic }}
{{Elementbox_oxistates | 5<br />(weakly [[base (chemistry)|basic]] oxide) }}
{{Elementbox_electroneg_pauling | 1.5 }}
{{Elementbox_ionizationenergies1 | 568 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|180]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | no data }}
{{Elementbox_eresist_ohmmat0 | 177 n}}
{{Elementbox_thermalcond_wpmkat300k | 47 }}
{{Elementbox_cas_number | 7440-13-3 }}
{{Elementbox_isotopes_begin | isotopesof=protactinium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=230 | sym=Pa | na=[[synthetic radioisotope|syn]] | hl=17.4 d | dm=[[Electron capture|ε]] | de=1.310 | pn=230 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=230 | sym=Pa | na=[[synthetic radioisotope|syn]] | hl=17.4 d | dm=[[Beta minus decay|β<sup>-</sup>]] | de=0.563 | pn=230 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=231 | sym=[[protactinium|Pa]] | na=[[synthetic radioisotope|syn]] | hl=32760 a | dm=[[alpha decay|α]] | de=5.149 | pn=227 | ps=[[actinium|Ac]] }}
{{Elementbox_isotopes_decay | mn=233 | sym=[[protactinium|Pa]] | na=[[synthetic radioisotope|syn]] | hl=26.967 [[day|d]] | dm=[[beta emission|β<sup>-</sup>]] | de=0.571 | pn=233 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=92 | symbol=U | name=uranium | left=[[protactinium]] | right=[[neptunium]] | above=[[neodymium|Nd]] | below=(Uqb) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery gray metallic }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|238.02891(3)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 7s<sup>2</sup> 5f<sup>2</sup> 6d<sup>1</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 21, 9, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 19.1 }}
{{Elementbox_densityliq_gpcm3mp | 17.3 }}
{{Elementbox_meltingpoint | k=1405.3 | c=1132.2 | f=2070 }}
{{Elementbox_boilingpoint | k=4404 | c=4131 | f=7468 }}
{{Elementbox_heatfusion_kjpmol | 9.14 }}
{{Elementbox_heatvaporiz_kjpmol | 417.1 }}
{{Elementbox_heatcapacity_jpmolkat25 | 27.665 }}
{{Elementbox_vaporpressure_katpa | 2325 | 2564 | 2859 | 3234 | 3727 | 4402 | comment= }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | orthorhombic }}
{{Elementbox_oxistates | 5<br />(weakly [[base (chemistry)|basic]] oxide) }}
{{Elementbox_electroneg_pauling | 1.38 }}
{{Elementbox_ionizationenergies2 | 597.6 | 1420 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|175]] }}
{{Elementbox_vanderwaalsrad_pm | [[1 E-10 m|186]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | [[paramagnetism|paramagnetic]] }}
{{Elementbox_eresist_ohmmat0 | 0.280 µ}}
{{Elementbox_thermalcond_wpmkat300k | 27.5 }}
{{Elementbox_thermalexpansion_umpmkat25 | 13.9 }}
{{Elementbox_speedofsound_rodmpsat20 | 3155 }}
{{Elementbox_youngsmodulus_gpa | 208 }}
{{Elementbox_shearmodulus_gpa | 111 }}
{{Elementbox_bulkmodulus_gpa | 100 }}
{{Elementbox_poissonratio | 0.23 }}
{{Elementbox_mohshardness | 6.0 }}
{{Elementbox_vickershardness_mpa | 1960 }}
{{Elementbox_brinellhardness_mpa | 2400 }}
{{Elementbox_cas_number | 7440-61-1 }}
{{Elementbox_isotopes_begin | isotopesof=uranium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=232 | sym=U | na=[[synthetic radioisotope|syn]] | hl=[[1 E9 s|68.9 y]] | dm=[[alpha emission|α]] & [[spontaneous fission|SF]] | de=5.414 | pn=228 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=233 | sym=U | na=[[synthetic radioisotope|syn]] | hl=[[1 E12 s|159,200 y]] | dm=SF & α | de=4.909 | pn=229 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=234 | sym=U | na=0.006% | hl=245,500 [[year|y]] | dm=SF & α | de=4.859 | pn=230 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=235 | sym=U | na=0.72% | hl=[[1 E16 s|7.038 E8 y]] | dm=SF & α | de=4.679 | pn=231 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=236 | sym=U | na=[[synthetic radioisotope|syn]] | hl=[[1 E14 s|2.342 E7 y]] | dm=SF & α | de=4.572 | pn=232 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_decay | mn=238 | sym=U | na='''99.275%''' | hl=[[1 E17 s|4.468 E9 y]] | dm=SF & α | de=4.270 | pn=234 | ps=[[thorium|Th]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=93 | symbol=Np | name=neptunium | left=[[uranium]] | right=[[plutonium]] | above=[[promethium|Pm]] | below=(Uqt) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery metallic }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(237)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>4</sup> 6d<sup>1</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 22, 9, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 20.2 }}
{{Elementbox_meltingpoint | k=910 | c=637 | f=1179 }}
{{Elementbox_boilingpoint | k=4273 | c=4000 | f=7232 }}
{{Elementbox_heatfusion_kjpmol | 3.20 }}
{{Elementbox_heatvaporiz_kjpmol | 336 }}
{{Elementbox_heatcapacity_jpmolkat25 | 29.46 }}
{{Elementbox_vaporpressure_katpa | 2194 | 2437 | | | | | comment= }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | ??? 3 forms: orthorhombic,<br> tetragonal and cubic }}
{{Elementbox_oxistates | 6, '''5''', 4, 3<br />([[amphoteric]] oxide) }}
{{Elementbox_electroneg_pauling | 1.36 }}
{{Elementbox_ionizationenergies1 | 604.5 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|175]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | ??? }}
{{Elementbox_eresist_ohmm | (22 °C) 1.220 µ}}
{{Elementbox_thermalcond_wpmkat300k | 6.3 }}
{{Elementbox_cas_number | 7439-99-8 }}
{{Elementbox_isotopes_begin | isotopesof=neptunium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=235 | sym=Np | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|396.1 d]] | dm=[[alpha emission|α]] | de=5.192 | pn=231 | ps=[[protactinium|Pa]] }}
{{Elementbox_isotopes_decay | mn=235 | sym=Np | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|396.1 d]] | dm=[[electron capture|ε]] | de=0.124 | pn=235 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=236 | sym=Np | na=[[synthetic radioisotope|syn]] | hl=[[1 E12 s|154 E3 y]] | dm=ε | de=0.940 | pn=236 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=236 | sym=Np | na=[[synthetic radioisotope|syn]] | hl=[[1 E12 s|154 E3 y]] | dm=[[beta emission|β<sup>-</sup>]] | de=0.940 | pn=236 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=236 | sym=Np | na=[[synthetic radioisotope|syn]] | hl=[[1 E12 s|154 E3 y]] | dm=α | de=5.020 | pn=232 | ps=[[protactinium|Pa]] }}
{{Elementbox_isotopes_decay | mn=237 | sym=Np | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|2.144 E6 y]] | dm=[[spontaneous fission|SF]] & α | de=4.959 | pn=233 | ps=[[protactinium|Pa]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=94 | symbol=Pu | name=plutonium | left=[[neptunium]] | right=[[americium]] | above=[[samarium|Sm]] | below=(Uqq) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery white }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(244)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>6</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 24, 8, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 19.816 }}
{{Elementbox_densityliq_gpcm3mp | 16.63 }}
{{Elementbox_meltingpoint | k=912.5 | c=639.4 | f=1182.9 }}
{{Elementbox_boilingpoint | k=3501 | c=3228 | f=5842 }}
{{Elementbox_heatfusion_kjpmol | 2.82 }}
{{Elementbox_heatvaporiz_kjpmol | 333.5 }}
{{Elementbox_heatcapacity_jpmolkat25 | 35.5 }}
{{Elementbox_vaporpressure_katpa | 1756 | 1953 | 2198 | 2511 | 2926 | 3499 | comment= }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | monoclinic }}
{{Elementbox_oxistates | 6, 5, '''4''', 3<br />([[amphoteric]] oxide) }}
{{Elementbox_electroneg_pauling | 1.28 }}
{{Elementbox_ionizationenergies1 | 584.7 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|175]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | no data }}
{{Elementbox_eresist_ohmmat0 | 1.460 µ}}
{{Elementbox_thermalcond_wpmkat300k | 6.74 }}
{{Elementbox_thermalexpansion_umpmkat25 | 46.7 }}
{{Elementbox_speedofsound_rodmpsat20 | 2260 }}
{{Elementbox_youngsmodulus_gpa | 96 }}
{{Elementbox_shearmodulus_gpa | 43 }}
{{Elementbox_poissonratio | 0.21 }}
{{Elementbox_cas_number | 7440-07-5 }}
{{Elementbox_isotopes_begin | isotopesof=plutonium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=238 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E9 s|88 y]] | dm=[[Spontaneous fission|SF]] | de=? | pn=234 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=238 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E9 s|88 y]] | dm=[[alpha emission|α]] | de=5.5 | pn=234 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=239 | sym=Pu | na=[[trace radioisotope|trace]] | hl=[[1 E12 s|24.1 E3 y]] | dm=[[Spontaneous fission|SF]] | de=? | pn=235 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=239 | sym=Pu | na=[[trace radioisotope|trace]] | hl=[[1 E12 s|24.1 E3 y]] | dm=[[alpha emission|α]] | de=5.245 | pn=235 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=240 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E12 s|6.5 E3 y]] | dm=[[Spontaneous fission|SF]] | de=? | pn=240 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=240 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E12 s|6.5 E3 y]] | dm=[[beta emission|β]] | de=0.005 | pn=240 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=242 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E13 s|373 E3 y]] | dm=SF | de=? | pn=238 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=242 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E13 s|373 E3 y]] | dm=α | de=4.984 | pn=238 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=244 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E15 s|80.8 E6 y]] | dm=[[alpha emission|α]] | de=4.666 | pn=240 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_decay | mn=244 | sym=Pu | na=[[synthetic radioisotope|syn]] | hl=[[1 E15 s|80.8 E6 y]] | dm=[[Spontaneous fission|SF]] | de=? | pn=240 | ps=[[uranium|U]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=95 | symbol=Am | name=americium | left=[[plutonium]] | right=[[curium]] | above=[[europium|Eu]] | below=(Uqp) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery white }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(243)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>7</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 25, 8, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 12 }}
{{Elementbox_meltingpoint | k=1449 | c=1176 | f=2149 }}
{{Elementbox_boilingpoint | k=2880 | c=2607 | f=4725 }}
{{Elementbox_heatfusion_kjpmol | 14.39 }}
{{Elementbox_heatvaporiz_kjpmol | ??? }}
{{Elementbox_heatcapacity_jpmolkat25 | 62.7 }}
{{Elementbox_vaporpressure_katpa | 1239 | 1356 | | | | | comment= }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | hexagonal }}
{{Elementbox_oxistates | 6, 5, 4, '''3'''<br />([[amphoteric]] oxide) }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 578 }}
{{Elementbox_atomicradius_pm | [[1 E-10 m|175]] }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | no data }}
{{Elementbox_thermalcond_wpmkat300k | 10 }}
{{Elementbox_cas_number | 7440-35-9 }}
{{Elementbox_isotopes_begin | isotopesof=americium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=241 | sym=Am | na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|432.2 y]] | dm=[[spontaneous fission|SF]] | de=? | pn=237 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay | mn=241 | sym=Am | na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|432.2 y]] | dm=[[alpha decay|α]] | de=5.638 | pn=237 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay | mn=242[[meta state|m]] | sym=Am | na=[[synthetic radioisotope|syn]] | hl=141 [[year|y]] | dm=[[Isomeric transition|IT]] | de=0.049 | pn=238 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay | mn=242[[meta state|m]] | sym=Am | na=[[synthetic radioisotope|syn]] | hl=141 [[year|y]] | dm=α | de=5.637 | pn=238 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay | mn=242[[meta state|m]] | sym=Am | na=[[synthetic radioisotope|syn]] | hl=141 [[year|y]] | dm=SF | de=? | pn=238 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay | mn=243 | sym=Am | na=[[synthetic radioisotope|syn]] | hl=[[1 E11 s|7370 y]] | dm=SF | de=? | pn=239 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_decay | mn=243 | sym=[[americium|Am]] | na=[[synthetic radioisotope|syn]] | hl=[[1 E11 s|7370 y]] | dm=α | de=5.438 | pn=239 | ps=[[neptunium|Np]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=96 | symbol=Cm | name=curium | left=[[americium]] | right=[[berkelium]] | above=[[gadolinium|Gd]] | below=(Uqh) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | silvery }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(247)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>7</sup> 6d<sup>1</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 25, 9, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 13.51 }}
{{Elementbox_meltingpoint | k=1613 | c=1340 | f=2444 }}
{{Elementbox_boilingpoint | k=3383 | c=3110 | f=5630 }}
{{Elementbox_heatfusion_kjpmol | ??? 15 }}
{{Elementbox_heatvaporiz_kjpmol | ??? }}
{{Elementbox_vaporpressure_katpa | 1788 | 1982 | | | | | comment= }}
{{Elementbox_section_atomicprop | color1=#ff99cc | color2=black }}
{{Elementbox_crystalstruct | hexagonal close-packed }}
{{Elementbox_oxistates | 3<br />([[amphoteric]] oxide) }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 581 }}
{{Elementbox_section_miscellaneous | color1=#ff99cc | color2=black }}
{{Elementbox_magnetic | no data }}
{{Elementbox_cas_number | 7440-51-9 }}
{{Elementbox_isotopes_begin | isotopesof=curium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=242 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=160 days | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=242 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=160 days | dm=α | de=6.1 | pn=238 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=243 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E8 s|29.1 y]] | dm=[[alpha emission|α]] | de=6.169 | pn=239 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=243 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E8 s|29.1 y]] | dm=[[electron capture|ε]] | de=0.009 | pn= | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=243 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E8 s|29.1 y]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=244 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=18.1 [[year|y]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=244 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=18.1 [[year|y]] | dm=α | de=5.902 | pn=240 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=245 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E11 s|8500 y]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=245 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E11 s|8500 y]] | dm=α | de=5.623 | pn=241 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=246 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=4730 y | dm=α | de=5.475 | pn=242 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=246 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=4730 y | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=247 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E14 s|15.6 E6 y]] | dm=α | de=5.353 | pn=243 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=248 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E13 s|340 E3 y]] | dm=α | de=5.162 | pn=244 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=248 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=[[1 E13 s|340 E3 y]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=250 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=9000 y | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=250 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=9000 y | dm=α | de=5.169 | pn=246 | ps=[[plutonium|Pu]] }}
{{Elementbox_isotopes_decay | mn=250 | sym=Cm | na=[[synthetic radioisotope|syn]] | hl=9000 y | dm=[[beta emission|β<sup>-</sup>]] | de=0.037 | pn=250 | ps=[[berkelium|Bk]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=97 | symbol=Bk | name=berkelium | left=[[curium]] | right=[[californium]] | above=[[terbium|Tb]] | below=(Uqs) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | unknown, probably silvery<br />white or metallic gray }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(247)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>9</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 27, 8, 2 }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | (alpha) 14.78 }}
{{Elementbox_density_gpcm3nrt | (beta) 13.25 }}
{{Elementbox_meltingpoint | k=(beta) 1259 | c=986 | f=1807 }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 601 }}
{{Elementbox_magnetic | no data }}
{{Elementbox_thermalcond_wpmkat300k | 10 }}
{{Elementbox_cas_number | 7440-40-6 }}
{{Elementbox_isotopes_begin | isotopesof=berkelium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=245 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E5 s|4.94 d]] | dm=[[electron capture|ε]] | de=0.810 | pn=245 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=245 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E5 s|4.94 d]] | dm=[[alpha emission|α]] | de=6.455 | pn=241 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=246 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=1.8 [[day|d]] | dm=α | de=6.070 | pn=242 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=246 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=1.8 [[day|d]] | dm=ε | de=1.350 | pn=246 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=247 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|1380 y]] | dm=α | de=5.889 | pn=243 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=248 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E8 s|>9 y]] | dm=α | de=5.803 | pn=244 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=249 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|320 d]] | dm=α | de=5.526 | pn=245 | ps=[[americium|Am]] }}
{{Elementbox_isotopes_decay | mn=249 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|320 d]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=249 | sym=Bk | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|320 d]] | dm=[[beta emission|β<sup>-</sup>]] | de=0.125 | pn=249 | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=98 | symbol=Cf | name=californium | left=[[berkelium]] | right=[[einsteinium]] | above=[[dysprosium|Dy]] | below=(Uqo) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | unknown, probably silvery<br />white or metallic gray }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(251)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>10</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 28, 8, 2 }}
{{Elementbox_section_physicalprop | color1=#ff99cc | color2=black }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 15.1 }}
{{Elementbox_meltingpoint | k=1173 | c=900 | f=1652 }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 608 }}
{{Elementbox_cas_number | 7440-71-3 }}
{{Elementbox_isotopes_begin | isotopesof=californium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=248 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|333.5 d]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=248 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|333.5 d]] | dm=[[alpha emission|α]] | de=6.361 | pn=244 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=249 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|351 y]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=249 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E10 s|351 y]] | dm=α | de=6.295 | pn=245 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=250 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E8 s|13.08 y]] | dm=α | de=6.128 | pn=246 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=250 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E8 s|13.08 y]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=251 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=898 [[year|y]] | dm=α | de=6.176 | pn=247 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=252 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=2.645 y | dm=α | de=6.217 | pn=248 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=252 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=2.645 y | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=253 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|17.81 d]] | dm=[[beta emission|β<sup>-</sup>]] | de=0.285 | pn=253 | ps=[[einsteinium|Es]] }}
{{Elementbox_isotopes_decay | mn=253 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|17.81 d]] | dm=α | de=6.124 | pn=249 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_decay | mn=254 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|60.5 d]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=254 | sym=Cf | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|60.5 d]] | dm=α | de=5.926 | pn=250 | ps=[[curium|Cm]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=99 | symbol=Es | name=einsteinium | left=[[californium]] | right=[[fermium]] | above=[[holmium|Ho]] | below=(Uqe) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | unknown, probably silvery<br />white or metallic gray }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(252)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>11</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 29, 8, 2 }}
{{Elementbox_phase | [[solid]] }}
{{Elementbox_density_gpcm3nrt | 8.84 }}
{{Elementbox_meltingpoint | k=1133 | c=860 | f=1580 }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 619 }}
{{Elementbox_magnetic | no data }}
{{Elementbox_cas_number | 7429-92-7 }}
{{Elementbox_isotopes_begin | isotopesof=einsteinium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=252 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|471.7 d]] | dm=[[alpha emission|α]] | de=6.760 | pn=248 | ps=[[berkelium|Bk]] }}
{{Elementbox_isotopes_decay | mn=252 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|471.7 d]] | dm=[[electron capture|ε]] | de=1.260 | pn= | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_decay | mn=252 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|471.7 d]] | dm=[[beta emission|β<sup>-</sup>]] | de=0.480 | pn= | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=253 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|20.47 d]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=253 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|20.47 d]] | dm=α | de=6.739 | pn=249 | ps=[[berkelium|Bk]] }}
{{Elementbox_isotopes_decay | mn=254 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=275.7 [[day|d]] | dm=ε | de=0.654 | pn=254 | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_decay | mn=254 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=275.7 [[day|d]] | dm=β | de=1.090 | pn=254 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=254 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=275.7 [[day|d]] | dm=α | de=6.628 | pn=250 | ps=[[berkelium|Bk]] }}
{{Elementbox_isotopes_decay | mn=255 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=39.8 d | dm=β<sup>-</sup> | de=0.288 | pn=255 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=255 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=39.8 d | dm=α | de=6.436 | pn=251 | ps=[[berkelium|Bk]] }}
{{Elementbox_isotopes_decay | mn=255 | sym=Es | na=[[synthetic radioisotope|syn]] | hl=39.8 d | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=100 | symbol=Fm | name=fermium | left=[[einsteinium]] | right=[[mendelevium]] | above=[[erbium|Er]] | below=(Upn) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | unknown, probably silvery<br />white or metallic gray }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(257)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>12</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 30, 8, 2 }}
{{Elementbox_phase | presumably a [[solid]] }}
{{Elementbox_meltingpoint | k=1800 | c=1527 | f=2781 }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 627 }}
{{Elementbox_cas_number | 7440-72-4 }}
{{Elementbox_isotopes_begin | isotopesof=fermium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=252 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=[[1 E4 s|25.39 h]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=252 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=[[1 E4 s|25.39 h]] | dm=[[alpha emission|α]] | de=7.153 | pn=248 | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_decay | mn=253 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=[[1 E5 s|3 d]] | dm=[[electron capture|ε]] | de=0.333 | pn=253 | ps=[[einsteinium|Es]] }}
{{Elementbox_isotopes_decay | mn=253 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=[[1 E5 s|3 d]] | dm=α | de=7.197 | pn=249 | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_decay | mn=255 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=20.07 [[hour|h]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=255 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=20.07 [[hour|h]] | dm=α | de=7.241 | pn=251 | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_decay | mn=257 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|100.5 d]] | dm=[[alpha emission|α]] | de=6.864 | pn=253 | ps=[[californium|Cf]] }}
{{Elementbox_isotopes_decay | mn=257 | sym=Fm | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|100.5 d]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=101 | symbol=Md | name=mendelevium | left=[[fermium]] | right=[[nobelium]] | above=[[thulium|Tm]] | below=(Upu) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | unknown, probably silvery<br />white or metallic gray }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(258)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>13</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 31, 8, 2 }}
{{Elementbox_phase | presumably a [[solid]] }}
{{Elementbox_meltingpoint | k=1100 | c=827 | f=1521 }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 635 }}
{{Elementbox_magnetic | no data }}
{{Elementbox_cas_number | 7440-11-1 }}
{{Elementbox_isotopes_begin | isotopesof=mendelevium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=257 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|5.52 h]] | dm=[[electron capture|ε]] | de=0.406 | pn=257 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=257 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|5.52 h]] | dm=[[alpha emission|α]] | de=7.558 | pn=253 | ps=[[einsteinium|Es]] }}
{{Elementbox_isotopes_decay | mn=257 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=[[1 E_ s|5.52 h]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=258 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=[[1 E6 s|51.5 d]] | dm=ε | de=1.230 | pn=258 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=260 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=31.8 [[day|d]] | dm=SF | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_decay | mn=260 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=31.8 [[day|d]] | dm=α | de=7.000 | pn=256 | ps=[[einsteinium|Es]] }}
{{Elementbox_isotopes_decay | mn=260 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=31.8 [[day|d]] | dm=ε | de=? | pn=260 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=260 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=31.8 [[day|d]] | dm=[[beta emission|β<sup>-</sup>]] | de=1.000 | pn=260 | ps=[[nobelium|No]] }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
{{Elementbox_header | number=102 | symbol=No | name=nobelium | left=[[mendelevium]] | right=[[lawrencium]] | above=[[ytterbium|Yb]] | below=(Upb) | color1=#ff99cc | color2=black }}
{{Elementbox_series | [[actinide]]s }}
{{Elementbox_groupperiodblock | group=??? | period=7 | block=f }}
{{Elementbox_appearance | unknown, probably silvery<br />white or metallic gray }}
{{Elementbox_atomicmass_gpm | [[1 E-25 kg|(259)]] }}
{{Elementbox_econfig | [[[radon|Rn]]] 5f<sup>14</sup> 7s<sup>2</sup> }}
{{Elementbox_epershell | 2, 8, 18, 32, 32, 8, 2 }}
{{Elementbox_phase | presumably a [[solid]] }}
{{Elementbox_meltingpoint | k=1100 | c=827 | f=1521 }}
{{Elementbox_electroneg_pauling | 1.3 }}
{{Elementbox_ionizationenergies1 | 642 }}
{{Elementbox_cas_number | 10028-14-5 }}
{{Elementbox_isotopes_begin | isotopesof=nobelium | color1=#ff99cc | color2=black }}
{{Elementbox_isotopes_decay | mn=253 | sym=No | na=[[synthetic radioisotope|syn]] | hl=[[1 E2 s|1.7 m]] | dm=[[alpha emission|α]] | de=8.440 | pn=249 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=253 | sym=No | na=[[synthetic radioisotope|syn]] | hl=[[1 E2 s|1.7 m]] | dm=[[electron capture|ε]] | de=3.200 | pn=253 | ps=[[mendelevium|Md]] }}
{{Elementbox_isotopes_decay | mn=255 | sym=No | na=[[synthetic radioisotope|syn]] | hl=3.1 [[minute|m]] | dm=α | de=8.445 | pn=251 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=255 | sym=No | na=[[synthetic radioisotope|syn]] | hl=3.1 [[minute|m]] | dm=ε | de=2.012 | pn=255 | ps=[[mendelevium|Md]] }}
{{Elementbox_isotopes_decay | mn=259 | sym=No | na=[[synthetic radioisotope|syn]] | hl=[[1 E3 s|58 m]] | dm=α | de=7.910 | pn=255 | ps=[[fermium|Fm]] }}
{{Elementbox_isotopes_decay | mn=259 | sym=No | na=[[synthetic radioisotope|syn]] | hl=[[1 E3 s|58 m]] | dm=ε | de=0.500 | pn=259 | ps=[[mendelevium|Md]] }}
{{Elementbox_isotopes_decay | mn=259 | sym=No | na=[[synthetic radioisotope|syn]] | hl=[[1 E3 s|58 m]] | dm=[[spontaneous fission|SF]] | de=? | pn=? | ps=? }}
{{Elementbox_isotopes_end}}
{{Elementbox_footer | color1=#ff99cc | color2=black }}
