Which among the following elements has completely filled $4 \mathrm{~d}$ orbital?

Which among the following elements has completely filled $4 \mathrm{~d}$ orbital?
  1. Ag
  2. $\mathrm{Cd}$
  3. $\mathrm{Sc}$
  4. $\mathrm{Zr}$

Solution

$\mathrm{Cd}(\mathrm{z}=48) \Rightarrow[\mathrm{Kr}] 4 \mathrm{~d}^{10} 5 \mathrm{~s}^2$ Cd has completely filled $4 \mathrm{~d}$ - orbital.

Asked in: MHT CET 2021 (20 Sep Shift 2)

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