Oxygen - Wikipedia, the free encyclopedia
Atomic properties Oxidation states 2, 1, −1, −2 Electronegativity Pauling scale: 3.44 Ionization energies 1st: 1313.9 kJ/mol 2nd: 3388.3 kJ/mol 3rd: 5300.5 kJ/mol (more) Covalent radius 66±2 pm Van der Waals radius 152 pm Miscellanea Crystal structure cub...