84 Po
Post-transition metal
Polonium
Discovered by Marie Curie.
Properties of Polonium
- Atomic number (Z)
- 84
- Symbol
- Po
- Atomic mass
- 209 g/mol
- Category
- Post-transition metal
- Group
- 16
- Period
- 6
- Electron configuration
- [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
- Electronegativity (Pauling)
- 2
- Atomic radius
- 135 pm
- First ionization energy
- 812 kJ/mol
- Melting point
- 527 K (253.9 °C)
- Boiling point
- 1235 K (961.9 °C)
- Density
- 9.32 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1898