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 General | States | Energies | Oxidation & Electrons | Appearance & Characteristics | Reactions | Other Forms Radius | Conductivity | Abundance


Name: Oxygen Symbol: O
Group: Non-Metal, Chalcogen Atomic weight: 15.9994
Density @ 293 K: 0.001429 g/cm3 Atomic volume: 14.0 cm3/mol
Group: Non-Metal, Chalcogen discovered: 1774


state (s, l, g): g
melting point: 54.8 K boiling point: 90.2 K
Heat of fusion: 0.22259 kJ/mol Heat of vaporization: 3.4099 kJ/mol


1st ionization energy: 1313.9 kJ/mole
electronegativity: 3.44 2nd ionization energy: 3388.2 kJ/mole
electron affinity: 140.97875 kJ/mole 3rd ionization energy: 5300.3 kJ/mole
Specific heat: 0.92 J/gK heat atomization: 249 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,6 electron configuration: [He] 2s2 2p4
minimum oxidation number: -2 maximum oxidation number: 2
min. common oxidation no.: -2 max. common oxidation no.: 0

Appearance & Characteristics:

structure: color: colorless
uses: rocket fuel, steel mfr. toxicity: no
hardness: mohs characteristics: diatomic,2 forms: O2, O3


reaction with air: none
reaction with 6M HCl: none reaction with 6M HCl: none
reaction with 15M HNO3: none reaction with 6M NaOH: none

Other Forms:

number of isotopes: 3 hydride(s): H2O
oxide(s): O2 O3 chloride(s): Cl2O ClO2 Cl2O7


ionic radius (2- ion): 126 pm ionic radius (1- ion): pm
atomic radius: 73 pm ionic radius (1+ ion): pm
ionic radius (2+ ion): pm ionic radius (3+ ion): pm


thermal conductivity: 0.03 J/m-sec-deg
electrical conductivity: 0 1/mohm-cm polarizability: 0.793 A^3


source: Air
rel. abund. solar system: 7.377 log abundance earth's crust: 5.7 log
cost, pure: 0.3 $/100g cost, bulk: $/100g