84
Po
Polonium
Metalloid period 6 group 16 p-block discovered: 1898
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 84
- Atomic mass
- 208.98243 a.m.u.
- Electron configuration
- [Xe]6s2 4f14 5d10 6p4
- Electronegativity
- 2 on the Pauling scale
- Atomic radius
- 197 pm
- Ionization energy
- 8.417 eV
- Electron affinity
- 1.9 eV
- Oxidation states
- +4, +2
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 527 K (253,85 °C)
- Boiling point
- 1235 K (961,85 °C)
- Density
- 9.32 g/cm³