Question

The ionic radii (in Å) of N3–, O2–and F–are respectively:

Answer 1

1.71, 1.40 and 1.36

The ions F^-, O^2- and N^3- are isoelectronic (same number of electrons) and belongs to the same period (Period 2). The size of such ions decreases with increase in atomic number or decreases moving from left to right or increases with the increase in the negative charge.