1.

In whichof the followingpairsboth thespecieshavenearlythe samesize ?

Answer»

`K^(+) F^(-)`
`Rb^(+) ,O^(2-)`
`Li^(+) ,Mg^(2+)`
`Mg^(2+) ,A1^(3+)`

SOLUTION :Only`Mg^(2+)` (65 pm ) andA1 (50 pm)havewidelydifferentsizeswhile allothershave nearlythe SAMESIZE `K^(+) (133 pm) F^(-)(136 pm), Rb^(+)(147) pm) O^(2-)(140 pm)` and `Li^(+) (60 pm), Mg^(2+)(65 pm)`


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