Which of the following ions has the maximum i | vedclass

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(A) All the given ions $(C^{4-}, N^{3-}, O^{2-}, Mg^{2+})$ are isoelectronic species,meaning they all have $10$ electrons.For isoelectronic species,th

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$C^{4-}$

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(A) All the given ions $(C^{4-}, N^{3-}, O^{2-}, Mg^{2+})$ are isoelectronic species,meaning they all have $10$ electrons.For isoelectronic species,the ionic radius decreases as the nuclear charge (number of protons) increases.The number of protons in these ions are: $C = 6, N = 7, O = 8, Mg = 12$.Since $C^{4-}$ has the lowest nuclear charge $(Z = 6)$,it has the weakest attraction for the electrons,resulting in the largest ionic radius.

Which of the following ions has the maximum ionic radius?

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