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Niobium (Nb)
Atomic number: 41 · Category: transition metal · Group 5 · Period 5 · Phase: Solid
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.
Atomic mass: 92.906372
Density: 8.57
Melting point: 2750 K
Boiling point: 5017 K
Appearance: gray metallic, bluish when oxidized
Source: Wikipedia
Block: d
Molar heat: 24.6
CPK color:#73c2c9
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d4
Configuration (semantic): [Kr] 4d4 5s1
Shells: 2, 8, 18, 12, 1
Electronegativity (Pauling): 1.6
Electron affinity: 88.516
Ionization energies: 652.1, 1380, 2416, 3700, 4877, 9847, 12100
Periodic position
Group: 5
Period: 5
xpos: 5
ypos: 5
Spectral/Bohr images
Image
3D Model