Learn advanced science concepts the easy way with the Science Made Simple newsletter. Everything we see is made up of tiny little parts called atoms. The atoms are made of even smaller parts. These are called protons, electrons and neutrons. They are very different from each other in many ways.
Neutrons have no charge.
Usually, atoms have the same number of electrons and protons. But if you rub things together, electrons can move from one atom to another. Some atoms get extra electrons. They have a negative charge. Other atoms lose electrons.