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_ |
|---|---|---|---|---|---|---|---|---|
| 77 | Iridium | Ir | 9 | 6 | d | Solid | Primordial | Transition metal |
| 78 | Platinum | Pt | 10 | 6 | d | Solid | Primordial | Transition metal |
| 79 | Gold | Au | 11 | 6 | d | Solid | Primordial | Transition metal |
| 80 | Mercury | Hg | 12 | 6 | d | Liquid | Primordial | Transition metal |
| 81 | Thallium | Tl | 13 | 6 | p | Solid | Primordial | Metal |
| 82 | Lead | Pb | 14 | 6 | p | Solid | Primordial | Metal |
| 83 | Bismuth | Bi | 15 | 6 | p | Solid | Primordial | Metal |
| 84 | Polonium | Po | 16 | 6 | p | Solid | Transient | Metal |
| 85 | Astatine | At | 17 | 6 | p | Solid | Transient | Halogen |
| 86 | Radon | Rn | 18 | 6 | p | Gas | Transient | Noble gas |
| 87 | Francium | Fr | 1 | 7 | s | Solid | Transient | Alkali metal |