Oxygen - Wikipedia
https://en.wikipedia.org/wiki/Oxygen
Atomic number (Z) 8: Group: group 16 (chalcogens) Period: period 2: Block p-block: Electron configuration 2s 2 2p 4: Electrons per shell: 2, 6: Physical properties; Phase at STP: gas: Melting point (O 2) 54.36 K (−218.79 °C, −361.82 °F) Boiling point (O 2) 90.188 K (−182.962 °C, −297.332 °F) Density (at STP) 1.429 g/L: when liquid (at b.p.) Appearance: gas: colorless, liquid and solid: pale blue
Appearance: gas: colorless, liquid and solid: pale blue
DA: 79 PA: 87 MOZ Rank: 95