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Niobium, formerly columbium, is a chemical element with the symbol Nb 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. Wikipedia
Symbol: Nb
Electron configuration: Kr 4d4
Atomic number: 41
Melting point: 2,469 °C
Atomic Mass: 92.90638 ± 0.00002 u
Discoverer: Charles Hatchett
Source: Google
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