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Molecular formula : MW : CAS :
nature : Periodic System V ethnic Chinese Vice-group elements. V including vanadium, niobium and tantalum Ta Nb three elements. Most atoms have an outer layer or two electronics, but the valence +5 highest attainable price. Hard-all. The air uses. At room temperature reaction is not easy, when the high temperature and oxygen, sulfur, such as halogen compound. They Nitrogen group similarities and M2O5-oxide. Radioelement protactinium Pa sometimes classified this group.
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