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21. Two elements P and Q combine to form a compound. If P has 2 electrons and Q has 6 electrons in their outermost shell, what will be formula of the compound formed? (1)PQ (2)P2Q (3)P2Q3 (4)PQ2

Answer» 21. Two elements P and Q combine to form a compound. If P has 2 electrons and Q has 6 electrons in their outermost shell, what will be formula of the compound formed? (1)PQ (2)P2Q (3)P2Q3 (4)PQ2


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