Question

among O^2- , F^- ions which one has smaller in size ​

Answer 1

Answer:

fluorine is smaller in size than oxygen

Explanation:

flurine hasbmor electrons and hence it's attraction to the neucleus is more so the atom is smaller n size.

the atomic size decreases from left to right and increase from top to bottom as number of shells increase.

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Answer 2

Answer:

$O^{2-} > F^{-}$

Explanation:

As we go right in a period, the size generally decreases.

Also, F^- has 9 protons and 10 electrons and O^2- has 8 protons and 10 electrons. Hence, the effective nuclear charge per electron is more in F- and therefore it is smaller in size.