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NiobiumNb Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 1

Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name comes from Greek mythology:Niobe, daughter of Tantalus since it is so similar to tantalum.

41 Atomic Number
92.91  u Atomic Mass
2741.15  K Melting Point
5017  K Boiling Point
8.57  g/cm³ Density
2.1  Å Atomic Radius
1.64  Å Covalent Radius
1.6 Electronegativity
6.76  eV First Ionization Energy
88.52 Electron Affinity
5 Number of Shells
2, 8, 18, 12, 1 Electron Shell Occupations
0.27  J/g Specific Heat