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JEE · NEET Previous Year Question

$In which one of the following pairs, both the elements does not have (n - 1) d^{10} n s^{2} configuration in its elementary state?$

Topic: JEE PYQ

Answer: D. Full step-by-step solution below.

A $Zn, Cd$
B $Cd, Hg$
C $Hg, Cn$
D $Cu, Zn$

Correct answer: D

Solution

(d) : Cu : 3 d^{10} 4 s^{1} Zn : 3 d^{10} 4 s^{2}

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