1.

The maximum tendency to form the uni positive ion is for the element with configuration.

Answer»

`1s^(2)2S^(2)2p^(6)3s^(2)`
`1s^(2)2S^(2)2p^(6)3s^(2)3p^(1)`
`1s^(2)2s^(2)2p^(6)3s^(2)3p^(2)`
`1s^(2)2s^(2)2p^(6)3s^(2)3p^(3)`

Answer :B


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