Zr
Zirconium
40
Atomic Number: 40
Atomic mass: 91.2242
Ionization energy: 640
Electronaffinity: -41
Covalent radius: 148
Calculated radius: 206
Empirical radius: 155
Vanderwaals radius:
Electronegativity: 1.33
Density: 6.51
Oxidation states: 1, 2, 3, 4
Melting point: 2128
Boiling point: 4682
Electron configuration: [Kr] 4d2 5s2
Element group: 4
Element period: 5

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