A proton is a subatomic particle found in the nucleus of an atom, carrying a positive electric charge. Protons contribute to the atomic number and define the element.
5 Must Know Facts For Your Next Test
Protons have a positive charge of +1e, where e is the elementary charge.
The number of protons in an atom's nucleus determines the element's atomic number.
Protons are composed of three quarks: two up quarks and one down quark.
The mass of a proton is approximately 1.67 x 10^-27 kilograms, slightly less than that of a neutron.
In neutral atoms, the number of protons equals the number of electrons.