8 O 15.999

Oxygen

Category: Nonmetal | State: Gas

Atomic Properties

Atomic Number 8
Atomic Mass 15.999
Electronic Configuration [He] 2s² 2p⁴

Periodic Table Placement

Group 16
Period 2
Block p-block

Physical Properties & Discovery

Melting Point -218.8°C
Boiling Point -183.0°C
Density 0.001429 g/cm³
Discovered By Joseph Priestley (1774)

Frequently Asked Questions about Oxygen