Niobium or columbium is the chemical element with the symbol Nb and the atomic number 4. Physical and chemical properties Niobium. Niobium is in many ways similar to its predecessors in group 5. Application of the given chemical element in the industry.
09.01.2012 |
Сhemistry |
Иностранные языки и языкознание |
Язык: английский |
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