What is Proton

Proton:-

      A proton is a particle of an atom which has a positive electric charge that lies within the nucleus of an atom. The proton has +1 charge (alternatively, 1,602 x 10^-19 coulombs), exactly the opposite of the charge -1 containing the electron.

       In a neutral atom, the number of electrons and protons are always equal. While when an atom gain or loses an electron then it becomes an ion (cation or anion). In an ion the number of electrons and protons do not remain same.