Polonium

Metalloid · 208.98243 u · group 16, period 6

Polonium · Po

Atomic number84

SymbolPo

CategoryMetalloid

Standard stateSolid

Group · Period · Block16 · 6 · p

Electron configuration[Xe]6s2 4f14 5d10 6p4

Atomic mass208.98243 u

Atomic radius197 pm

Protons / Neutrons / Electrons84 / 125 / 84

Shells (e⁻ per shell)2, 8, 18, 32, 18, 6

Electronegativity (Pauling)2

Ionization energy8.417 eV

Electron affinity1.9 eV

Oxidation states+4, +2

Melting point527 K · 253.9 °C

Boiling point1.24e+3 K · 961.9 °C

Density9.32 g/cm³

Year discovered1898

CPK color

#AB5C00

State at room temp (25 °C)

solid

Position