Stable elementary particles having the smallest known positive charge, found in the nuclei of all elements. The proton mass is less than that of a neutron. A proton is the nucleus of the light hydrogen atom, i.e., the hydrogen ion.
A positively charged particle located in the nucleus of an atom electron.
A particle in the nucleus of an atom that has a positive charge.
Positively charged subatomic particle that forms the nucleus of all atoms.
A positively charged particle forming the nucleus of hydrogen and present in the nuclei of all elements, the atomic number of the element indicating the number of protons present. Its mass is 1836 times that of an electron.
The smallest discernible unit of positive electricity, corresponding to a positively charged particle within an atom.