Ionization Energy

Definition

Ionization energy is the amount of energy required to remove an electron from a gaseous atom or ion.

Related terms

Electron Affinity:

This is the amount of energy released when an electron is added to a neutral atom to form a negative ion.

Valence Electrons:

These are electrons that reside in the outermost shell surrounding an atomic nucleus and can participate in chemical reactions.

Atomic Radius:

This refers to the size of an atom, typically measured by the distance from its nucleus to its outermost electrons.