Ionic radii tend to increase down a group, so A, cationic radii tend to decrease across a period, so D, Ionic radii increase when switching from cations to anions in a period, E.
The periodic trends of ionic radii include the following:
A. Ionic radii tend to increase down a group.
D. Cationic radii tend to decrease across a period.
E. Ionic radii increase when switching from cations to anions in a period.
A periodic trend can be defined as the specific pattern or regular variation in the properties of chemical elements arranged on a periodic table based on their atomic number (number of protons).
Ionic radius can be defined as the distance between the nucleus and the valence electron residing in the outermost shell of an ion. Thus, an ionic radius is a measure of the ion of an atom in a crystal lattice.
Note: Ionic radii is simply a plural of ionic radius.
On the periodic table, some of the periodic trends associated with the ionic radii of chemical elements are:
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