Essential Facts
| Atomic number | 81 |
| Name | Thallium |
| Symbol | Tl |
| Atomic mass | 204.383 |
| Classification | Other metal |
| State at 20°C | Solid |
| Melting point | 303.5°C |
| Boiling point | 1457°C |
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Thallium (Tl)Essential Facts
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