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16 July, 20:14

The charges of a set of isoelectronic ions vary from 3 + to 3-. Place the ions in order of increasing size.

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  1. 16 July, 20:22
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    Iso-electronic species have same number of electrons. Positive charged ions will have smaller size. As electrons add, size increases due to electronic repulsion.

    Following species are isoelectronic.

    Al³⁺ < Mg²⁺ < Na¹⁺ < Ne < F⁻¹ < O⁻² < N⁻³
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