MCQ
The correct order of density is
  • A
    $Be > Mg > Ca > Sr$
  • B
    $Sr > Ca > Mg > Be$
  • $Sr > Be > Mg > Ca$
  • D
    $Be > Sr > Mg > Ca$

Answer

Correct option: C.
$Sr > Be > Mg > Ca$
c
In $II'A'$ group density decreases down the group till $Ca$ and after that it increases.Correct order of density is $Sr > Be > Mg > Ca$

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