- -ii- Some of the exceptions are observed in electronic configuration due to very little energy difference between -n - 1-d and ns orbitals such as Cr - 3d- 4s- instead of 3d 4-452 Cu- 3d10-4s instead of 3d- 452

Question

Toppr Admin · Accepted Answer

	Column I		Column II
A	$C r$	(i)	$[A r] 3 d^{8} 4 s^{0}$
B	$F e^{2 +}$	(ii)	$[A r] 3 d^{10} 4 s^{1}$
C	$N i^{2 +}$	(iii)	$[A r] 3 d^{6} 4 s^{0}$
D	$C u$	(iv)	$[A r] 3 d^{5} 4 s^{1}$
		(v)	$[A r] 3 d^{6} 4 s^{2}$

- (ii) Some of the exceptions are observed in electronic configuration due to very little energy difference between (n − 1)d and ns orbitals such as Cr : 3d", 4s' instead of 3d 4,452 Cu: 3d10,4s instead of 3d', 452