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Niobio – Niobium
Mass: 92.91 u
1s2
2s2
2p6
3s2
3p6
4s2
3d10
4p6
5s2
4d3
Melting point: 2750 K
Boiling point: 5017 K
Density: 8.5 g/cm3
Discovery: C. Hatchett (1801)
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 mithology; Niobe. It was not
until the early 20th century that niobium was first used commercially.