Oxygen

Source: http://www.tabulka.cz/english/elements/show.asp?id=8

name Oxygen
latin Oxygenium
french Oxygéne
german Sauerstoff
symbol O
proton number 8
atomic weight 15.9994
Pauling electronegativity 3.44
electronic configuration [He] 2s22p4
1s22s22p4
melting point 54.8 K, -218.35°C, -361.03°F
boiling point 90.2 K, -182.95°C, -297.31°F
group 16
period 2
state (by 20°C) gas
oxidation states -2

Discoverer

Year of discovery Discoverer
1774 Joseph Priestley (1733-1804)


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