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# The ionic radius of Na+ ions is 1.02

Question:

1. $1.05$ and $0.99$

2. $0.72$ and $0.54$

3. $0.85$ and $0.99$

4. $0.68$ and $0.72$

Correct Option: 2,

Solution:

$\mathrm{Na}^{+}>\mathrm{Mg}^{2+}>\mathrm{Al}^{3+}$