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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 elements indicating following atomic numbers belong to same group
  • ✓
    $11$ and $37$
  • B
    $19$ and $15$
  • C
    $39$ and $88$
  • D
    None of these
✓

Answer

Correct option: A.
$11$ and $37$
a
Electronic configuration for elements with atomic number $11$ and $37$ are $[ Ne ] \,3 s ^1$ and $[ Kr ]\, 5 s ^1$ respectively. Both belongs to same group $($i.e. group $1 )$

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