Argon

Atomic symbol: Ar
Atomic number: 18
Atomic mass: 39.95

Appearance: colorless gas at 25°C

Group: 0 / 18
Period: 3
Series: Noble gases
Block: p
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶

Odorless, nonflammable and nontoxic.

The ‘go-to’ gas when an inert environment in needed, such as for food storage, shielding in welding, and in light bulbs.

Fun Fact! The name “argon” comes from the Greek word “argos”, meaning lazy or inactive, due to it’s highly inert nature.