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72-92 elements
| Definition | Term |
|---|---|
| Hafnium | Hf |
| Tantalum | Ta |
| Tungsten | W |
| Rhenium | Re |
| Osmium | Os |
| Iridium | Ir |
| Platinum | Pt |
| Gold | Au |
| Mercury | Hg |
| Thallium | Tl |
| Lead | Pb |
| Bismuth | Bi |
| Polonium | Po |
| Astatine | At |
| Radon | Rn |
| Francium | Fr |
| Radium | Ra |
| Actinium | Ac |
| Thorium | Th |
| Protactinium | Pa |
| Uranium | U |