78 Pt 195.0849

Platinum

TRANSITION METAL

Phase: Solid

Discovered: Antonio de Ulloa

Block: D

Summary

Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, gray-white transition metal. Its name is derived from the Spanish term platina, which is literally translated into "little silver".

Appearance: silvery white

Source: Wikipedia

Physical Properties

Atomic Mass 195.0849 u

Density 21.45 g/cm³

Melting Point 2041.4 K

Boiling Point 4098 K

Molar Heat 25.86 J/(mol·K)

Electron Affinity 205.041 kJ/mol

Ionization Energies

1^st: 870 kJ/mol

2^nd: 1791 kJ/mol