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Test Index
Class 11 NEET Chemistry Classification Of Elements And Periodicity In Properties
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Question : 50
Total: 51
The electronic configuration of four elements are given below. Which elements does not belong to the same family as others?
(1989)
[
X
e
]
4
f
14
5
d
10
4
s
2
[
K
r
]
4
d
10
5
s
2
[
N
e
]
3
s
2
3
p
5
[
A
r
]
3
d
10
4
s
2
Validate
Solution:
Elements (a), (b) and (d) belong to the same group since each one of them has two electrons in valence shell. In contrast, element (c) has seven electrons in the valence shell, and hence it lies in other group.
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