Characteristics of the element
| Symbol: Tl |
| Name: Thallium |
| Latin name: Thallium |
| Atomic number: 81 |
| Atomic mass: 204,3833 |
| Melting point: 303,5 (°C) |
| Boiling point: 1457-1473 (°C) |
| Density 11,850 (g/cm 3 ) |
| Electronegativity: 1,4 |
| Oxidation number: I,III |
| Number of neutrons: 123 |
| Crystal structure: Hexagonal |
| Chemical serie: Other metals |
| Color: blue |
| Electron configuration: 2-8-18-32-18-3 |
| Year of discovery:: 1861 |
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Update: 26.11.25
Update: 26.11.25