Question
Fri June 22, 2012 By:

which of the elements Na , Mg , Si and P would have greatest difference between first and second ionization enthalpies ?

Expert Reply
Fri June 22, 2012
Among the elements Na, Mg, Si and P; Na would have the greatest difference between the first and second ionization enthalpies since after losing one electron it takes up the electronic configuration 1s2 2s2 2p6, so it becomes stable with completely filled p orbitals so it will be difficult to remove an electron from the stable configuration. But in case of the other elements, after removal of first electron the configuration obtained is not very stable and second electron can be easily removed so the difference between the first and second inoization enthalpy is less.
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