Which element from the following is NOT regar | vedclass

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(C) transition element is defined as an element which has an incompletely filled $d$-orbital in its ground state or in any one of its oxidation states

Vedclass · Accepted Answer

$Cd$

Vedclass · Answer

(C) transition element is defined as an element which has an incompletely filled $d$-orbital in its ground state or in any one of its oxidation states.$Sc$ $([Ar] 3d^1 4s^2)$ has a partially filled $d$-orbital.$Cu$ $([Ar] 3d^{10} 4s^1)$ forms $Cu^{2+}$ $([Ar] 3d^9)$, which has a partially filled $d$-orbital.$Au$ $([Xe] 4f^{14} 5d^{10} 6s^1)$ forms $Au^{3+}$ $([Xe] 4f^{14} 5d^8)$, which has a partially filled $d$-orbital.$Cd$ $([Kr] 4d^{10} 5s^2)$ has a completely filled $d$-orbital in its ground state and in its only common oxidation state $Cd^{2+}$ $([Kr] 4d^{10})$.Therefore, $Cd$ is not considered a transition element.

Which element from the following is $NOT$ regarded as a transition element?

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