1.

An element belongs to 3^(rd) period and group 17 of the modern periodic table, find out: (a) The number of valence electrons and valency (b) Lewis structure of its compound with hydrogen (c) Electronic configuration of this element

Answer»

Solution :(a) No. of valence electrons - SEVEN (7), Valency - 1
(b) Formula with HYDROGEN - HCl
(C) 2, 8, 7


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