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Where are the electrons?

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An electron is therefore considered nearly massless in comparison with a proton or a neutron, and the electron mass is not included in calculating the mass number of an atom. Description of the arrangement of electrons in atoms of various elements. read more

Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron. In electrical conductors, current flow results from the movement of electrons from atom to atom individually, and from negative to positive electric poles in general. read more

The electron is a subatomic particle, symbol e − or β −, whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. read more

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