If the electronic configurations of atoms A and B are 3s2, 1s2, 2p6, 3s2, 3p1 and 1s2, 2s2, 2p4 respectively, then (a) Which atom forms negative ion ? (b) Which atom forms positive ion ? (c) What is the valency of atom A ? (d) What is the molecular formula of the compound formed by atoms A and B?
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Atom B forms negative while A forms positive
valency of A is 3, molecular formula will be A2B3
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