Question

1.
An oxide ion O-2has -2 charge. Explain why?
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Answer 1

Answer:

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Explanation:

02

Answer 2

Answer:

Oxide ion has -2 charge because to become stable ,i.e., to achieve noble gas configuration it gains two more electrons, so its configuration becomes (2,8) which is also the configuration of Neon and thus the valency of oxygen is 2.

Explanation:

As electrons are negatively charged particles the increase in their number gives a negative result to any neutral element in this case it is Oxygen , and as it's mentioned above in the answer ,i.e., the valency of oxygen is 2 , therefore after attaining noble gas configuration it becomes negatively charged and it's written as O-2 .

I hope , you may have understood the above explanation.

Thanks for asking.