File:First_Ionization_Energy_blocks.svg · Wikimedia Commons · See Wikimedia Commons

EntityQ483769· pop 69· linked from 430 articles

ionization energy

Also known as electron binding energy, ionisation energy

minimum amount of energy required to remove an electron from an atom or molecule in the gaseous state

AI overview

Ionization energy is the minimum amount of energy needed to remove an electron from an atom or molecule in its gaseous state. It matters because it helps us understand how easily atoms give up electrons, which influences how they bond with other atoms and their chemical behavior.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Image: First Ionization Energy blocks.svg

Show 1 more fact

exact match: purl.obolibrary.org/obo/ENVO_2000024

Sources (3)

via Wikidata · CC0

~31 min read

Article

Ionization energy trends plotted against the atomic number, in units eV. The ionization energy gradually increases from the alkali metals to the noble gases. The maximum ionization energy also decreases from the first to the last row in a given column, due to the increasing distance of the valence electron shell from the nucleus. Predicted values are used for elements beyond 104.

In physics and chemistry, ionization energy (IE) is the minimum energy required to remove the most loosely bound electron(s) (the valence electron(s)) of an isolated gaseous atom, positive ion, or molecule. The first ionization energy is quantitatively expressed as