The meaning of PERIODICITY is the quality, state, or fact of being regularly recurrent or having periods. How to use periodicity in a sentence.

PERIODICITY definition: the character of being periodic; the tendency to recur at regular intervals. See examples of periodicity used in a sentence.

Look up periodicity or periodic in Wiktionary, the free dictionary. Periodicity or periodic may refer to:

Add to word list science the tendency of an event or series of events to happen repeatedly in a fixed pattern (Definition of periodicity from the Cambridge Academic Content Dictionary © …

Jul 23, 2020 · In chemistry, periodicity refers to repeating trends in the elements of the periodic table, such as ionization energy, atomic radius, electron affinity, and electronegativity.

Dec 22, 2025 · The periodicity of properties of the elements is caused by the periodicity in electronic structure.

Jul 14, 2025 · Periodicity in chemistry, a cornerstone concept for understanding the organization and behavior of matter, manifests as the recurring patterns of elemental properties observed …

pl. pe·ri·o·dic·i·ties 1. The quality or state of being periodic; recurrence at regular intervals. 2. The repetition of similar properties in chemical...

Trends such as electronegativity and ionization energy demonstrate periodicity, with elements in the same group sharing similar reactivity due to their similar electron configurations.

There are four meanings listed in OED's entry for the noun periodicity, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.