Niobium
From Citizendium, the Citizens' Compendium
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Niobium is a chemical element, having the chemical symbol Nb. Its atomic number (the number of protons) is 41. It has a Standard Atomic Weight of 92.91, and is typically found as a solid in its elemental form.
Niobium is considered to be a member of the "Transition Metal" family of elements, and has a boiling point of 4744°C.

