Among `Na^(+) Na, Mg` and `Mg^(2+)`, the largest particle

Options

A. `Mg^(2+)`
B. Na
C. Mg
D. `Na^(+)`.

Answer

c

Explanation

As we move from left to right across a period, there is regular decrease in atomic radii of the representative elements. Thus Na is larger in size than Mg.
The ionic radii of a cation is always less than the atomic radii of that very atom.
`underset(1.54 Å)(Na) underset(0.95A)( Na^(+)) underset(1.36A)(Mg) underset(0.65A)(Mg^(2+))`