noun

proton

PROH-tahn/ˈprəʊtɑːn/

A positively charged particle found in an atom's nucleus.

Each proton in the atom carries a positive charge.

A simplified helium atom model with two positively marked protons and two unmarked neutrons clustered in its nucleus, surrounded by two small negative electrons.

Etymology

The name draws on Greek “first,” supposedly because hydrogen, whose commonest nucleus is a single proton, was thought to be a constituent of all elements.

In context

The Organic Chemistry Tutor6:41

now in the case of the aluminum ion it's going to be the atomic number 13 minus the positive 3 charge so there's 10 electrons and it makes sense each proton has a charge of 1

Elements, Atoms, Molecules, Ions, Ionic and Molecular Compounds, Cations vs Anions, Chemistry

More examples

The nucleus of ordinary hydrogen contains one proton.
Different elements have different numbers of protons.
The model colors each proton red and each neutron gray.

Forms

proton · protons