Identify the species having larger radius from the following pairs:i.

1.	Identify the species having larger radius from the following pairs:i. Na and Na+ii. Na+ and Mg2+
Answer» i. The nuclear charge is the same in Na and Na⁺. But Na⁺ has a smaller number of electrons and a smaller number of occupied shells (two shells in Na⁺, while three shells in Na). Therefore, radius of Na is larger. ii. Na⁺ and Mg²⁺ are isoelectronic species. Mg²⁺ has a larger nuclear charge than that of N^a+. Therefore, N^a+ has larger radius.

Identify the species having larger radius from the following pairs:i. Na and Na+ii. Na+ and Mg2+

Answer»

i. The nuclear charge is the same in Na and Na⁺. But Na⁺ has a smaller number of electrons and a smaller number of occupied shells (two shells in Na⁺, while three shells in Na).

Therefore, radius of Na is larger.

ii. Na⁺ and Mg²⁺ are isoelectronic species.

Mg²⁺ has a larger nuclear charge than that of N^a+.

Therefore, N^a+ has larger radius.

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Identify the species having larger radius from the following pairs:i. Na and Na+ii. Na+ and Mg2+

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