Argon

About 0.9% argon exists in the atmosphere. It is a neutral and colorless gas and does not exist in nature other than in the air. It is a highly useful gas though it cannot sustain life. Argon is soluble in water in the same amount as oxygen gas and is 2.5 times more soluble in water than nitrogen gas. Argon gas is used in metals and manufacturing industry, iron and steel industry, laboratories and semi conductor industry.