Argon

Ar

Argon

Argon's atomic number is 18. It's mass number rounds up to 40. Argon is located in period 3 and group 18 (noble gas family). Argon is a non metal and the common state of matter is gas.

Uses

Argon is used to power low energy light bulbs. It's also used in double glazed windows to retain heat. Another use for argon is in welding tools.