Why does Zinc not show variable valency?(a) Complete ‘d’ subshell(b) Inert pair effect(c) 4s^2 subshell(d) 4s^3 subshellThis question was addressed to me in quiz.I'd like to ask this question from Electronic Configurations of the D-Block Elements topic in section D and F-Block Elements of Chemistry – Class 12

Why does Zinc not show variable valency?(a) Complete ‘d’ subshell(

1.	Why does Zinc not show variable valency?(a) Complete ‘d’ subshell(b) Inert pair effect(c) 4s^2 subshell(d) 4s^3 subshellThis question was addressed to me in quiz.I'd like to ask this question from Electronic Configurations of the D-Block Elements topic in section D and F-Block Elements of Chemistry – Class 12
Answer» The correct ANSWER is (a) Complete ‘d’ subshell Explanation: Both zinc and mercury have completely FILLED d-orbital. So, they tend to lose only 2 electrons from their outermost shell and have only one OXIDATION state. HENCE, they only show a valency of +2 and do not show VARIABLE valency.

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