The Mg²⁺ ion is smaller than F^-, even though they are isoelectronic.

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Quizplus · Accepted Answer

The Mg²⁺ ion has a smaller size because it has a larger nuclear charge (due to Mg having a higher atomic number than F) and can attract its electrons more strongly. This is known as the effective nuclear charge, and it is a factor that affects the size of ions and atoms. Isoelectronic species have the same number of electrons, but their nuclear charges can differ, leading to differences in size.

The Mg2+ Ion Is Smaller Than F-, Even Though They

The Mg²⁺ Ion Is Smaller Than F^-, Even Though They