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

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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+

(c) Na+ > Mg2+ > Al3+ > Si4+

(d) Na+ > Mg2+ > Al3+ < Si4+

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1 Answer

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by (69.0k points)
edited by

The correct option is : (c) Na+ > Mg2+ > Al3+ > Si4+

Explanation:

In isoelectronic ions, the size of the cation decreases as the magnitude of the positive charge increases.

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