Classification of Elements and Periodicity in Properties - Result Question 45
####45. The electronic configuration of four elements are given below. Which element does not belong to the same family as others?
[1989]
(a)
(b)
(c)
(d)
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Solution:
- (c) Elements (a), (b) and (d) belong to the same group since each one of them has two electrons in the s-sub shell. In contrast, element (c) has seven electrons in the valence shell and hence does not lie in the same group.
