Platinum

Transition metals · Group 10 · Period 6

Atomic properties

Atomic number	78
Symbol	Pt
Standard atomic weight	195.08
Classification	Transition metals
Group	10
Period	6
Block	d-block
Electron configuration	[Xe] 4f14 5d9 6s1
Electronegativity (Pauling)	2.28
Common oxidation states	+4, +2

Physical properties

Phase at 20 °C	Solid
Density	21.45 g/cm³
Melting point	1768.3 °C
Boiling point	3825 °C
Discovered	1735
CAS number	—

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