Question
Select the elements belonging to same group from the following list :-
✓
Answer
a
option $A$ is correct .
option $A$ is correct .
because every period is having certain intervals such as 2,8,8,18,18,32,31 to 1 to 7 periods respectively.
so that if we add these numbers to element atomic number we can get next element of the same group.a)
$4,4+8,12+8,20+18,38+18,56+32$
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