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NDA General Science Chemistry Questions Part 1
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© examsnet.com
Question : 89
Total: 100
The number of valence electrons in the
O
2
−
ion is
[NDA I 2014]
4
6
8
10
Validate
Solution:
Oxygen has atomic no. 8. Its electronic configuration becomes 2,8,6 i.e it has 6 valence electrons. In
O
2
−
, there are two more electrons. Hence number of valence electrons in the
O
2
−
is 8 .
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