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  4. The electronic configuration of Cr3+ is

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

KCETKCET 2007Structure of Atom

Solution:

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

$Cr ^{3+}:[ Ar ] 3 d^{3} 4 s^{\circ}$