1.

The order of magnitude of ionic radii of ions `Na^(+),Mh^(2+),Al^(3+)` and `Si^(4+)` isA. `Na^(+)ltMg^(2+)ltAl^(3+)ltSi^(4+)`B. `Mg^(2+)gtNa^(+)gtAl^(3+)gtSi^(4+)`C. `Al^(3+)gtNa^(+)gtSi^(4+)gtMg^(2+)`D. `Na^(+)gtMg^(2+)gtAl^(3+)gtSi^(4+)`

Answer» Correct Answer - D
`Na^(+)gtMg^(2+)gtAl^(3+)gtSi^(4+)`. All are isoelectronic but nuclear charge per electron is greatest for `Si^(4+)`. So it has smallest size and nuclear charge per electron for `Na^(+)` is smallest. So it has largest size.


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