Question

The electronic configuration of $ Cr^{3+} $ is

• A. $[ Ar ] 3 d^{4} 4 s^{2}$
• B. $[ Ar ] 3 d^{3} 4 s^{0}$
• C. $[ Ar ] 3 d^{2} 4 s^{1}$
• D. $[ Ar ] 3 d^{5} 4 s^{1}$

Answer 1

Answer: (B)

$Cr(24):[ Ar ] 3 d^{5} 4 s^{1}$
$Cr ^{3+}:[ Ar ] 3 d^{3} 4 s^{0}$