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

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 3. Classification of elements and periodicity in properties4 Marks
MCQ
Assuming that elements are formed to complete the seventh period, what would be the  atomic number of the alkaline earth metal of the eighth period?
  • A
    $113$
  • ✓
    $120$
  • C
    $119$
  • D
    $106$
✓

Answer

Correct option: B.
$120$
b
$7^{th}$ period ends in $118$

hence the alkaline earth metal shall belong to the second group, thus its atomic number would be : $120\{$ Option $B\}$

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