Atomic Number: 8

Name: Oxygen

Atomic symbol: O

Atomic Weight: 15.9994

Electron affinity: -141 kJ/mol

Electron configuration: 1s²2s²2p⁴

Ionization energies: 1,314 kJ/mol; 3,388 kJ/mol; 5,300 kJ/mol; 7,469 kJ/mol; 10,989 kJ/mol; 13,326 kJ/mol; 71,333 kJ/mol

Pauling electronegativity: 3.5

Melting Point: -218^oC

Boiling Point: -183^oC

Density: 1.43 x 10^-3 g/cm³

Standard potential (volts), X + 2e^- ---> X^2-:

Covalent radius: 0.66 angstroms

Ionic radius: 1.26 angstroms (-2); 1.76 angstroms (-1); 0.22 angstroms (+1); 0.09 angstroms (+6)

Van Der Wall's radius: 1.4 angstroms

Common oxidation states in compounds: -2, -1