It is a subatomic particle with a positive elementary electric charge 1, it is equal in absolute value and opposite in sign to that of the electron, and a mass 1836 times greater than that of an electron.

It is the region and energy space that is around the atom, and in which there is a greater probability of finding an electron, which performs wave movements.

It is the first subatomic particle to be detected. The physicist J. J. Thomson carried out experiments on gas discharge tubes

(also called electron shells) are fixed distances from the nucleus of an atom where electrons can be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center.