1.

Amongst the following the incorrect order is :-

Answer»

`IE_(1)(Al) lt IE_(1)(Mg)`
`IE_(1)(Na) lt IE_(1) (Mg)`
`IE_(2)(Mg) gt IE_(2)(Na)`
`IE_(3)(Mg) gt IE_(3)(Al)`

SOLUTION :(i) `IE_(1)[UNDERSET(3s^(2))(Mg) gt underset(3s^(2)3p^(1))(Al)]` penetration power
(ii)`IE_(1)[underset(3s^(1))(Na) lt underset(3s^(2))(Mg)] ""Z_("eff")`
(iii) `IE_(2)[underset(3s^(1))(Mg^(+))lt underset("(inert gas configuration)")underset(darr)underset(2p^(6))(Na^(+))]`
(iv) `IE_(3)[ underset(("inert gas CONF"^(r )))underset(darr)underset(+2)(Mg^(2+)) lt underset(3s^(1))(Na^(2+))]`


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