D And F Block Elements Question 153
Question: Zinc and mercury do not show variable valency like d-block elements because
[RPMT 2000; MP PMT 2000]
Options:
A) They are soft
B) Their d- shells are complete
C) They have only two electrons in the outermost subshell
D) Their d-shells are incomplete
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Answer:
Correct Answer: B
Solution:
$ _{30}Zn $ and $ _{80}Hg $ have their d orbitals completely filled so they do not show any variable valency.
BETA
