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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
The valency shell of calcium contains
  • A
    $8$ electrons
  • B
    $6$ electrons
  • C
    $4$ electrons
  • ✓
    $2$ electrons
✓

Answer

Correct option: D.
$2$ electrons
d
(d) Valence shell configuration for $IIA$ group elements is : $n{s^2}$

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