1. Education
You can opt-out at any time. Please refer to our privacy policy for contact information.

Discuss in my forum

Ionic Radius Trends in the Periodic Table

Periodic Table Trends for Ionic Radius

By

Ionic radius is different from atomic radius of an element.

Ionic radius is different from atomic radius of an element.

Science Photo Library - MEHAU KULYK, Getty Images

The ionic radius of the elements exhibits trends in the periodic table.

Ionic Radius and Group

As you move down a group in the periodic table, additional layers of electrons are being added, which naturally causes the ionic radius to increase as you move down the periodic table.

Ionic Radius and Period

As you move across a row of period of the periodic table, the ionic radius decreases for metals forming cations, as the metals lose their outer electron orbitals. The ionic radius increases for nonmetals as the effective nuclear charge decreases due to the number of electrons exceeding the number of protons.

Ionic Radius and Atomic Radius

The ionic radius is different from the atomic radius of an element. Positive ions are smaller than their uncharged atoms. Negative ions are larger than their atoms.

©2014 About.com. All rights reserved.