1.

Na^(+), Mg^(2+), Al^(3+) and Si^(4+) are isoelectronic. The order of their ionic size is

Answer»

`Na^(+) GT MG^(2+) LT Al^(3+) lt SI^(4+)`
`Na^(+) lt Mg^(2+) gt Al^(3+) gt Si^(4+)`
`Na^(+) gt Mg^(2+) gt Al^(3+) gt Si^(4+)`
`Na^(+) lt Mg^(2+) gt Al^(3+) lt Si^(4+)`

Solution :Amongst isoelectronic ions, the size of the cation decreases as the magnitude of the charge increases.


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