JEE Main · ChemistryEasy

$What is the general electronic configuration of d-block elements?$

A. $n s^{2} n p^{6}$
B. $(n - 1) d^{1 - 10} n s^{0 - 2}$
C. $(n - 1) d^{1 - 10} n s^{2}$
D. $(n - 2) f^{1 - 14} (n - 1) d^{0 - 1} n s^{2}$

Show correct answer & step-by-step solution

Correct answer: B — $(n - 1) d^{1 - 10} n s^{0 - 2}$

Solution

$The d-block elements occupy the groups 3 to 12 in the periodic table.$
$The valence electrons enter the penultimate d-orbital.$
$The general configuration is represented as (n - 1) d^{1 - 10} n s^{0 - 2} .$
$Hence the answer is (B).$

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