Identify the outer electronic configuration of first element of first transition series.

Identify the outer electronic configuration of first element of first transition series.
  1. $[\mathrm{Ar}] 3 \mathrm{~d}^1 4 \mathrm{~s}^1$
  2. $[\mathrm{Kr}] 4 \mathrm{~d}^{\circ} 5 \mathrm{~s}^2$
  3. $[\mathrm{Kr}] 4 \mathrm{~d}^1 5 \mathrm{~s}^2$
  4. $[\mathrm{Ar}] 3 \mathrm{~d}^1 4 \mathrm{~s}^2$

Solution

$\mathrm{Sc}(21)=[\mathrm{Ar}] 3 \mathrm{~d}^1 4 \mathrm{~s}^2$

Asked in: MHT CET 2022 (06 Aug Shift 1)

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