The electron is a subatomic particle and wave with a negative charge and has the smallest mass of the charged leptons family. Electrons make up most of the matter in the universe and are found in all atoms and elements. Electrons orbit the atomic nucleus of an atom, and are around 2000 times smaller then protons and neutrons.

Electrons are very important in the field of chemistry due to their role of determining the behavior of atoms and molecules. Electrons position in molecules and atoms define their chemical properties and energy.

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Diagram of the atom, with the electrons orbiting the atomic nucleus (Image Credit to Science Facts)