Consider the following species.
$N^{3 -}, O^{2 -}, M g^{2 +}$ and $F^{-}$
(i) What is common in them?
(ii) arrange them in order of increasing ionic radii.

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Solution

(i) They all have electronic configuration similar to inert gases, that is $1 s^{2} 2 s^{2} 2 p^{6}$ .
(ii) Order of ionic radii , $N^{- 3} > O^{- 2} > F^{- 1} > M g^{+ 2}$

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N^{3 -}

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Consider the following species:

N^3–, O^2–, F^–, Na⁺, Mg²⁺ and Al³⁺

(a) What is common in them?

(b) Arrange them in the order of increasing ionic radii.

N^{3 -}, N a^{+}, F^{-}, O^{2 -}, M g^{2 +}

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