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Atomic Number: 18
Ar
Ar

Argon

39.9480 u

Category

noble gas

State at Room Temperature

gas

Electron Configuration

1s² 2s² 2p⁶ 3s² 3p⁶

Valence Electrons

8

Lewis Dot:••••••••

Oxidation States

0

Melting Point

83.81 K

-189.34°C

Boiling Point

87.302 K

-185.85°C

Density

0.0017837

g/cm³

Position in Table

Group 18Period 3p-block

Discovery

Historical Information

Discovered byLord Rayleigh, William Ramsay
Year1894

Common Uses

Applications & Industries

Welding shield gas, light bulbs, food packaging, lasers

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