Question

Arrange the following ions decreasing oder of thier site N3- O2- Na+ F- Mg2+ Al3+

Answer 1

N3-
O2-
F -
Al3+
Mg 2+
Na+
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Answer 2

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~* THE ANSWER OF YOUR QUESTION IS..*~

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all the above ions are ISOELECTRONIC

and size order in isoelectronic is directly proportional to number of negative ion and inversly proportional to the no. of positive ion

so , in the above question size order will be

N-3 > O-2 > F- > Na+ > Mg+2 > Al+3

HOPE IT WILL HELP YOU