The relationship between atomic radius and ionic radius can be explored by examining…
CHEMISTRY · Multi-part · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties
Problem
The relationship between atomic radius and ionic radius can be explored by examining species that differ only in the gain or loss of electrons. Consider the four particles listed below: F (neutral atom), F−, Ne, and Na+.
(1) Part 1: (a) Compare the size of a neutral F atom with that of the F− ion. Provide a qualitative explanation for the observed difference.
(2) Part 2: (b) Although F− and Ne contain the same number of electrons, their radii differ. Explain why the species with the greater nuclear charge has the smaller radius.
(3) Part 3: (c) Neutral Na atoms have a substantially larger radius than Na+ ions, even though Na+ is isoelectronic with Ne. Describe the atomic-level changes that lead to this pronounced size difference.