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Actinides

The actinides (atomic numbers 89-103, from actinium to lawrencium) are the lower of the two rows pulled out below the main table. They are all radioactive. Uranium and plutonium power nuclear reactors and weapons; later actinides (americium, curium, einsteinium) exist mostly in research quantities created in particle accelerators or reactor neutron capture.

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Category: All elements Nonmetals Noble gases Alkali metals Alkaline earth metals Metalloids Post-transition metals Transition metals Lanthanides Actinides
Period: 1 2 3 4 5 6 7
Group: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Block: S P D F
Phase: Solid Liquid Gas

List of chemical elements (15)

Cards Compact Table List
Ac Actinium 89 227 Am Americium 95 243 Bk Berkelium 97 247 Cf Californium 98 251 Cm Curium 96 247 Es Einsteinium 99 252 Fm Fermium 100 257 Lr Lawrencium 103 262 Md Mendelevium 101 258 No Nobelium 102 259 Np Neptunium 93 237 Pa Protactinium 91 231.036 Pu Plutonium 94 244 Th Thorium 90 232.038 U Uranium 92 238.029