1.

Which of the following configurations would you expect to have the highest second ionisation enthalpy?

Answer»

`1s^(2)2S^(2)`
`1s^(2)2s^(2)2p^(4)`
`1s^(2)2s^(2)2p^(6)3s^(1)`
`1s^(2)2s^(2)2p^(1)`

Solution :After the LOSS of one electron, the atom acquires stable electronic configuration of noble GAS `(1s^(2)2s^(2)2p^(6))`. THEREFORE second ionisation enthalpy will be very HIGH.


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