proton

A proton is a small, positively charged particle found in the nucleus of an atom, which is the central core of an atom. Protons, along with neutrons, make up the atomic nucleus, and their number determines the element's identity—like carbon or oxygen. They are subatomic particles, meaning they are extremely tiny, and are fundamental building blocks of matter. The positive charge of a proton balances with electrons' negative charge around the nucleus, helping to keep atoms stable. Despite their tiny size, protons play a crucial role in defining the properties of elements and the behavior of atoms.