NO. 084Metalloid

Po

Polonium

Polonium is a rare, highly radioactive element discovered during research on radioactivity. It emits intense alpha radiation and has limited scientific and industrial use.

Crystal Structure

Simple cubic

Technical Specifications

Atomic Mass209 u

Density9.2 g/cm³

Melting Point527 K

Boiling Point1235 K

Atomic Radius135 pm

Electronegativity2

Ionization Energy812 kJ/mol

Electron Affinity183 kJ/mol

Bonding TypeCovalent

Oxidation States-2, 2, 4, 6

Acid/BaseCan act as acid or base

ReactivityHigh

Electron Configuration

[Xe] 4f14 5d10 6s2 6p4

Discovered ByMarie Curie

Year1898

Known Isotopes

Po-209Po-210