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  • From the following pairs of ions which one is not an iso-electronic pair ?  Option: 1 <img alt="O^{2-},F^{-}" src="/latex-image/?O%5E%7B2

From the following pairs of ions which one is not an iso-electronic pair ?
 

Option: 1

O^{2-},F^{-}


Option: 2

Na^{+},Mg^{2+}


Option: 3

Mn^{2+},Fe^{3+}

 


Option: 4

Fe^{2+},Mn^{2+}


Answers (1)

best_answer

The number of electrons present in the given ions-

O2-  ⇒ 18

F-  ⇒ 18

Na+  ⇒ 10

Mg2+  ⇒ 10

Mn2+  ⇒ 23

Fe3+  ⇒ 23

Fe2+  ⇒ 24

So, the pair of Fe^{2+},Mn^{2+} ions is not an iso-electronic pair.

Therefore, the correct option is (4).

Posted by

shivangi.shekhar

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