Ar
Argon
18
Atomic Number: 18
Atomic mass: 39.9481
Ionization energy: 1521
Electronaffinity: 0
Covalent radius: 97
Calculated radius: 71
Empirical radius: 71
Vanderwaals radius: 188
Electronegativity:
Density: 1.784
Oxidation states:
Melting point: 84
Boiling point: 87
Electron configuration: [Ne] 3s2 3p6
Element group: 18
Element period: 3

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