'The bump theory states that current flow is produced when an electron from one atom knocks electrons of another atom out of orbit.
An electron is a subatomic particle whose charge is the negative elementary charge. Electrons belong to the first generation of the leptonic particle family and are generally considered elementary particles because they have no known composition or substructure.
Electrons are negatively charged subatomic particles that are free to (not) bond with atoms. Electrons bound to atoms are one of the three main types of particles within atoms. The other two are protons and neutrons. Electrons, protons and neutrons together form the nucleus.
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