1(x)
Which of the following electronic configuration represents the most electropositive element?
- (a)2, 1
- (b)2, 8, 1
- (c)2, 2
- (d)2, 8, 2
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2, 8, 1
Reason — Electropositivity increases while traversing down a group and decreases from left to right in period. 2, 1 and 2, 2 belong to period 2 as they have 2 shells whereas 2, 8, 1 and 2, 8, 2 belong to period 3. Between 2, 8, 1 and 2, 8, 2, element with electronic configuration 2, 8, 1 will be more electropositive as it lies to the left of 2, 8, 2 in period 3.