Nb
Niobium
41
Atomic Number: 41
Atomic mass: 92.906382
Ionization energy: 652
Electronaffinity: -86
Covalent radius: 137
Calculated radius: 198
Empirical radius: 145
Vanderwaals radius:
Electronegativity: 1.6
Density: 8.57
Oxidation states: -1, 2, 3, 4, 5
Melting point: 2750
Boiling point: 5017
Electron configuration: [Kr] 4d4 5s1
Element group: 5
Element period: 5

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