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2. structure of atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
An element has the electronic configuration $1{s^2},2{s^2}2{p^6},3{s^2}3{p^2}$. Its valency electrons are
  • A
    $6$
  • B
    $2$
  • C
    $3$
  • ✓
    $4$
✓

Answer

Correct option: D.
$4$
d
(d) An element has the electronic configuration $1{s^2},\,2{s^2}\,2{p^6},\,\,3{s^2}\,3{p^2},\,(Si)$. It’s valency electrons are four.

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