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Answer to Question #22315 in Inorganic Chemistry for Deepak

Question #22315
mg+2 is smaller than O-2in size,though both have same electronic configuration ,why?
Expert's answer
Yes, Mg2+ is ion smaller than that of O2- because in Mg2+ 2 e-s are deducted from its shell where as in O2- 2 e-s are adding in ti d shell as a result oxygens shells increase leading to in crease in size where magnesium decreases in size due to deduction of 2 electrons.

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