Protons are positively charged subatomic particles found in the nucleus of an atom. They contribute to the atomic number and, therefore, the identity of an element.
5 Must Know Facts For Your Next Test
Protons have a positive electric charge of +1e or approximately $1.602 \times 10^{-19}$ coulombs.
The number of protons in an atom's nucleus is called its atomic number and defines the element.
Protons are composed of three quarks: two up quarks and one down quark.
Protons have a rest mass of approximately $1.6726 \times 10^{-27}$ kilograms, making them slightly less massive than neutrons but much more massive than electrons.
In a neutral atom, the number of protons equals the number of electrons.