реферат Chemical element Niobium
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.
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| Рубрика | Иностранные языки и языкознание |
| Вид | реферат |
| Язык | английский |
| Дата добавления | 09.01.2012 |
| Размер файла | 51,0 K |
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