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Elements 55-57/72-86
| Term | Definition |
|---|---|
| Cs | Cesium |
| Ba | Barium |
| La | Lanthanides |
| Hf | Hafnium |
| Ta | Tantalum |
| W | Tungsten |
| Re | Rhenium |
| Os | Osmium |
| Ir | Iridium |
| Pt | Platinum |
| Au | Gold |
| Hg | Mercury |
| Tl | Thallium |
| Pb | Lead |
| Bi | Bismuth |
| Po | Polonium |
| At | Astatine |
| Rn | Radon |