Answer to Question #26377 in Inorganic Chemistry for John Godson

Question #26377
The second ionization energy of alkaline earth metals is less than that of corresponding alkali metals because
1
Expert's answer
2013-03-14T10:22:33-0400
The second ionization energy of alkaline earth metals is less than that of corresponding alkali metals because& in alkali metals the second electron is to be removed from a cation, which has already acquired a noble gas configuration. In the case of alkaline earth metals the second electron is to be removed from a monovalent cation, which still has one electron in the outermost shell. Thus, the second electron can be removed more easily in the case of group 2 elements than in group 1 elements.

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