Three elements A, B and C have 3, 4 and 2 electrons respectively … - Vidyadip

Question

Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.

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Answer

A belongs to Group 13, B belongs to Group 14 and C belongs to Group 2. Valency of A is 3, that of B is 4 and that of C is 2.

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