Chemistry
The number of valence electrons in O2- is :
- 6
- 8
- 10
- 4
Atomic Structure
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Answer
8
Reason — Oxygen has atomic no. 8. Its electronic configuration becomes 2, 6 i.e., it has 6 valence electrons. In O2-, there are two more electrons. Hence, number of valence electrons in O2- is 8.
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