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