Argon exists as a monoatomic gas. If electric current is passed through argon gas, the gas gives off a blue glow. This is how blue “neon”...
Atomic # = 18 Atomic weight = 39.948
Argon exists as a monoatomic gas. If electric current is passed through argon gas, the gas gives off a blue glow. This is how blue “neon” lights are made. Argon gas is also used in flashlights.