Question

. Arrange the following in order of increasing radius:

a) Mg2+, Na+, Al3+
b) Na+, Al3+ , Mg2+
c) Mg2+ , Al3+ , Na+
d) Al3+ , Mg2+, Na+
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Answer 1

Al3+<Mg2+<Na+

Step-by-step explanation:

this is because of nuclear charge (no. of protons)

atomic radius is inversely proportional to nuclear charge.