Na+, Mg2+, Al3+ and Si4+ are isoelectronic. The order of their ionic size is (a) Na+ > Mg2+ < Al3+ < Si4+ (b) Na+ < Mg2+ > Al3+ > Si4+ (c) Na+ > Mg2+ > Al3+ > Si4+ (d) Na+ < Mg2+ > Al3+ < Si4+

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Na^+, Mg^2+, Al^3+ and Si^4+ are isoelectronic. The order of their ionic size is

Classification of Elements and Periodicity in Properties

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20/08/2021 11:48 am

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Deepak Rock

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Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is

(a) Na⁺ > Mg²⁺ < Al³⁺ < Si⁴⁺

(b) Na⁺ < Mg²⁺ > Al³⁺ > Si⁴⁺

(d) Na⁺ < Mg²⁺ > Al³⁺ < Si⁴⁺

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20/08/2021 11:50 am

Shivani siva

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Correct answer: (c) Na⁺ > Mg²⁺ > Al³⁺ > Si⁴⁺

Explanation:

Among the isoelectronic species, the cation having more positive charge would be the smaller in size.

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