Atomic number

Definition

The atomic number is the number of protons found in the nucleus of an atom. It uniquely identifies a chemical element and determines its position in the periodic table.

Related terms

Proton:

A positively charged particle located within an atom's nucleus.

Element:

A pure substance consisting only of atoms with the same number of protons.

Periodic Table:

A tabular arrangement of chemical elements organized based on their atomic number, electron configurations, and recurring chemical properties