Actinide
From Simple English Wikipedia, the free encyclopedia
The actinide series is the 15 chemical elements between actinium and lawrencium on the periodic table. They have the atomic numbers between 89 - 103. The actinide series is named after actinium. All of the elements are radioactive.
[edit] The actinide elements
| Atomic Number | Name | Symbol |
|---|---|---|
| 89 | Actinium | Ac |
| 90 | Thorium | Th |
| 91 | Protactinium | Pa |
| 92 | Uranium | U |
| 93 | Neptunium | Np |
| 94 | Plutonium | Pu |
| 95 | Americium | Am |
| 96 | Curium | Cm |
| 97 | Berkelium | Bk |
| 98 | Californium | Cf |
| 99 | Einsteinium | Es |
| 100 | Fermium | Fm |
| 101 | Mendelevium | Md |
| 102 | Nobelium | No |
| 103 | Lawrencium | Lr |
