Zinc and mercury do not show variable valency like d-block element bec – McqOptions

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1.	Zinc and mercury do not show variable valency like d-block element because
A.	they are soft.
B.	their d-shells are complete.
C.	they have only two electrons in the outermost shell.
D.	their d-shells are incomplete.
Answer» C. they have only two electrons in the outermost shell.

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