Ir
Iridium
77
Atomic Number: 77
Atomic mass: 192.2173
Ionization energy: 880
Electronaffinity: -151
Covalent radius: 137
Calculated radius: 180
Empirical radius: 135
Vanderwaals radius:
Electronegativity: 2.2
Density: 22.56
Oxidation states: -3, -1, 1, 2, 3, 4, 5, 6
Melting point: 2739
Boiling point: 4701
Electron configuration: [Xe] 4f14 5d7 6s2
Element group: 9
Element period: 6

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