ICSE Class 10 Chemistry
Question 26 of 30
Periodic Table — Periodic Properties & Variation of Properties — Question 21
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Question Question 21
The period and group to which the element 'X' with electronic configuration 2, 8, 8, 2 belongs.
Group 2, period 4
Reason — Period is determined by the number of shells of the element and group is determined by the number of valence electron hence, element X will belong to group 2 and period 4 because it has 4 shells and 2 valence electrons.