Metalloid

Polonium

Polonium (Po) has atomic number 84. PubChem classifies it as metalloid.

Atomic number

84

Symbol

Po

Atomic weight (source value)

208.98243

Electron configuration

[Xe]6s2 4f14 5d10 6p4

Standard state

Solid

Electronegativity (Pauling)

2

Melting point (K)

527

Boiling point (K)

1235

Density (g/cm³)

9.32

Oxidation states

+4, +2

Understanding this entry

Atomic number is the number of protons in the nucleus. Properties are reference values and may depend on conditions and measurement conventions. An atomic weight is not the mass of every isotope. For elements without a standard atomic weight, a source may report an isotope mass number. Blank source values are shown as unavailable rather than estimated.

Further reading and reference: NIH PubChem source dataset ↗. Values and educational summaries are not a substitute for specialised advice.