Argon

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Element

Name: Argon

Symbol: Ar

Atomic Number: 18

Atomic Mass: 39.9 amu

Number of electrons: 18

Classification: Non-metal

Crystal structure: Cubic

Color: Colorless gas

Date of Discovery: 1894

Name of Discoverer: Sir William Ramsey

Name Origin: From the Greek argon.

Uses: Lighting

Obtained from: Air