Details : Item 215

 123456
Alkali metals
Alkaline earth metal
Transition metals I
Transition metals II
Transition metals III
Transition metals IV
Post-transition metal
Metalloid
Diatomic non-metal
Noble gas
Other

Famille : Transition metals IV/1
Platinum
Symbol: Pt, phase: solid, silvery white. Because of
its scarcity in Earth only a few hundred tonnes
are produced annually. Compounds containing platinum
are applied in chemotherapy against cancer.
Properties
Atomic number78
Atomic weight195.084
Melting point (K)2041
Boiling point (K)4098
Speed of sound (m/s)2800
Discovery1748 (A. de Ulloa)