Chemical element List of the 118 known chemical elements List of the 118 known chemical elements

| Atomic_no_ | Name_ | Symbol | Group_ | Period | Block | State_at_STP | Occurrence | Description_ |
|---|---|---|---|---|---|---|---|---|
| 88 | Radium | Ra | 2 | 7 | s | Solid | Transient | Alkaline earth metal |
| 89 | Actinium | Ac | 3 | 7 | f | Solid | Transient | Actinide |
| 90 | Thorium | Th | 3 | 7 | f | Solid | Primordial | Actinide |
| 91 | Protactinium | Pa | 3 | 7 | f | Solid | Transient | Actinide |
| 92 | Uranium | U | 3 | 7 | f | Solid | Primordial | Actinide |
| 93 | Neptunium | Np | 3 | 7 | f | Solid | Transient | Actinide |
| 94 | Plutonium | Pu | 3 | 7 | f | Solid | Primordial | Actinide |
| 95 | Americium | Am | 3 | 7 | f | Solid | Transient | Actinide |
| 96 | Curium | Cm | 3 | 7 | f | Solid | Transient | Actinide |
| 97 | Berkelium | Bk | 3 | 7 | f | Solid | Transient | Actinide |
| 98 | Californium | Cf | 3 | 7 | f | Solid | Transient | Actinide |
| 99 | Einsteinium | Es | 3 | 7 | f | Solid | Synthetic | Actinide |