NO. 078Transition

Pt

Platinum

Platinum is a precious metal used extensively in catalytic converters and fine jewelry.

Crystal Structure

Face-centered cubic (fcc)

Atomic Mass195.08 u

Density21.45 g/cm³

Melting Point2041 K

Boiling Point4098 K

Atomic Radius139 pm

Electronegativity2.28

Ionization Energy870 kJ/mol

Electron Affinity205 kJ/mol

Bonding TypeMetallic

Oxidation States2, 4

Acid/BaseNeutral

ReactivityLow

Electron Configuration

[Xe] 4f14 5d9 6s1

Discovered ByAntonio de Ulloa

Year1735

Known Isotopes

Pt-190Pt-192Pt-194Pt-195Pt-196Pt-198