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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
MCQ
General outer electronic configuration of $d-$ block elements is :
  • A
    $ \ce{(n-1) d^{1-10} n s^3} $
  • B
    $\ce{(n+1) d^{1-10} n s^{0-2}} $
  • ✓
    $ \ce{(n-1) d^{1-10} n s^{0-2}} $
  • D
    $ \ce{(n-1) d^0 n s^{0-2}} $
✓

Answer

Correct option: C.
$ \ce{(n-1) d^{1-10} n s^{0-2}} $
$d-$ block elements are elements of group $3$ to $12$ in the centre of the periodic table.
So, general outer electronic configuration $= \ce{(n - 1)d^{1-10} ns}^{0-2}$.

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