Question

The valency of oxygen with atomic number 8 is:
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Answer 1

Answer:

The valency of oxygen with atomic number 8 is: 2

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Answer 2

Electronic configuration of oxygen is 2,6. If the number of electrons in the outer most shell exceeds 4 then it should be subtracted from the total number of electrons.
Oxygen-2,6
So electrons in outermost shell exceeds 4. So number of total electrons-number of electrons in outermost shell
8-6=2
So valency of oxygen with atomic number 8 is:2

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