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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
Highest ionisation energy stands for
  • ✓
    $He$
  • B
    $C$
  • C
    $N$
  • D
    $H$
✓

Answer

Correct option: A.
$He$
a
(a) $He$ has highest ionisation energy due to it full fill $1s$-orbital.

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