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Niobium is a chemical element originated from Niobe, daughter of king Tantalus from Greek mythology. It was first mentioned in 1801 and observed by C. Hatchett. The isolation was later accomplished and announced by W. Blomstrand. “Nb” is the canonical chemical symbol of niobium. Its atomic number in the periodic table of elements is 41 with location at Period 5 and Group 5, belonging to the d-block. The relative atomic mass of niobium is 92.906 38(2) Dalton, the number in the brackets indicating the uncertainty.