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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
Expert's answer
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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