Answer to Question #330754 in General Chemistry for Lady m

Question

Arrange the following species in order of (a) increasing ionic radius, and (b) increasing ionization energy: O2-, F-, Na+, Mg2+. Explain your answer in terms of nuclear charge and charge of ions.

Answer 1

а) F^-, O^2-, Mg²⁺, Na²

The radius of ions decreases with increasing charge of the atomic nucleus, in the series of the periodic system of chemical elements. And it increases from top to bottom in groups, due to an increase in the number of electrons, which, at energy levels farther from the nucleus, are worse attracted by the nucleus

b) Na, Mg, O, F

The ionization energy with increasing nuclear charge increases in the rows of the periodic table from left to right and from bottom to top