1.

The I.E_(1) among group 13 members follows as

Answer»

`BgtAlltGaltTl`
`BgtAlgtGAgtTl`
`BgtGagtAlgtTl`
`BgtGaltAlltTl`

Solution :The `IE_(1)` of Ga is more than that of AL because of the SMALL atomic size and greater effective NUCLEAR CHARGE of Ga.


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