Atomic Number: 9

Atomic Weight: 18.998403163

Melting Point: 53.53 K (-219.62°C or -363.32°F)

Boiling Point: 85.03 K (-188.12°C or -306.62°F)

Density: 0.001696 grams per cubic centimeter

Phase at Room Temperature: Gas

Element Classification: Non-metal

Period Number: 2    

Group Number: 17    

Group Name: Halogen