Thallium (Tl)
A fascinating post-transition metal element.
Thallium is element 81 on the periodic table.
Element properties
- Atomic number
- 81
- Symbol
- Tl
- Atomic mass
- 204.38 u
- Category
- Post-Transition Metal
- Period
- 6
- Group
- 13
- Block
- p
- State
- Solid
- Electron configuration
- [Xe] 4f14 5d10 6s2 6p1
- Electronegativity (Pauling)
- 1.62
- Density
- 11.85 g/cm³
- Melting point
- 304 °C
- Boiling point
- 1473 °C