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Platinum (Pt)

Platinum (Pt) is element 78 of the periodic table, a transition metal in period 6 and group 10. Its standard atomic weight is 195.084, so one mole of platinum atoms has a mass of 195.084 g. At room temperature it is a solid; it melts at 1768.4 °C and boils at 3824.85 °C.

78 Pt Platinum 195.084

Period 6, group 10 · Transition metal

← Ir Iridium Au Gold →

Atomic number	78
Symbol	Pt
Standard atomic weight	195.084
Molar mass	195.084 g/mol
Category	Transition metal
Group	10
Period	6
Block	d-block
Electron configuration	[Xe] 6s¹ 4f¹⁴ 5d⁹
Oxidation states	+4, +2
Electronegativity (Pauling)	2.28
Atomic radius (van der Waals)	209 pm
First ionisation energy	9 eV (868.4 kJ/mol)
Electron affinity	2.128 eV
State at room temperature	Solid
Melting point	2041.55 K (1768.4 °C)
Boiling point	4098 K (3824.85 °C)
Density	21.46 g/cm³
Discovered	1735

Group 10

Ni · Nickel Pd · Palladium Ds · Darmstadtium

Calculate with Platinum

Molar mass of Pt Balance an equation Grams, moles and particles Whole periodic table

Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.