Ionic radii are

Options

A. Directly proportional to effective nuclear charge
B. Directly proportional to square of effective nuclear charge
C. Inversely proportional to effective nuclear charge
D. Inversely proportional to square of effective nuclear charge.

Answer

C

Explanation

Iconic radius in the `n^(th)` orbit is given by `r_(n)=(n^2a)/(z)` or `r_(n) prop 1/Z`
where n is principal equation no, `a_(0)` is Bohr's raduis of hydrogen atom and `Z` is the effective nuclear energy.