Question

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Answer 1

2

is your answer.......

Answer 2

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⟹ The valency of oxygen is 2

⟹ because 2 atoms can be sufficient in the 1st shell and in the 2nd shell 8 can be sufficient

⟹ But we are having 8 atoms in oxygen so in the 1st shell 2 and the remaining will be 6 can be in 2nd shell

⟹ so 2 atoms should come out or go in

⟹ valency = 2

Thank you❤