Electron definition

ĭ-lĕktrŏn
Frequency:
A stable elementary particle in the lepton class having a negative electric charge of 1 elementary unit (about 1.602 × 10−19 coulombs) and a mass of about 9.11 × 10−28 grams. Electrons are found in shells orbiting the nuclei of atoms and can also move freely through space as cathode rays in a cathode-ray tube or as beta particles emitted by radioactive nuclei, or flow in a current through a conducting material impelled by an electric potential difference.
noun
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(particle physics) The lightest elementary particle with an electric charge: it is a lepton with a negative charge of c. 1.602 × 10-19 coulomb and a rest mass of c. 9.109 × 10-31 kg (c. 0.511 MeV/c2), which is c.11836 of the mass of a proton: ordinarily an atom has the same number of negative electrons around the nucleus as the number of positive protons in the nucleus.
noun
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A stable elementary particle in the lepton family having a mass at rest of 9.107 × 10&spminus;28 grams and a negative electric charge of approximately 1.602 × 10&spminus;19 coulombs. Electrons orbit about the positively charged nuclei of atoms in distinct orbitals of different energy levels, called shells . Electrons are the primary charge carriers in electric current.
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A positron or a negatron.
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An elementary particle that orbits the nucleus of an atom. There is one electron for every proton in the nucleus, which keeps the atom "electrically neutral," as electrons are considered to have a negative charge and protons a positive charge.Electron Imbalance Creates a ChargeWhen the number of electrons and protons are unequal, the atom is electrically charged. If there are more electrons than protons, it is negatively charged; if fewer electrons, it is positively charged. Electrical generators strip electrons away from their atoms to provide electricity, and electrons are removed, as well as added, to enable other electrical effects (see ion and n-type silicon). See atom, quantum state, wave-particle duality and photon.
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(physics) The subatomic particle having a negative charge and orbiting the nucleus; the flow of electrons in a conductor constitutes electricity.
noun
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The definition of an electron is the lightest basic electrically-charged particle.

An example of an electron is what orbits the nucleus of an atom.

noun
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An elementary particle of matter that carries a negative charge of approximately 1.6021
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A taxonomic genus within the family Momotidae.
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Other Word Forms

Noun

Singular:
electron
Plural:
electrons

Origin of electron

  • electr(ic) (i)on

    From American Heritage Dictionary of the English Language, 5th Edition

  • From electr(ic) + (i)on, originally proposed as the name for the electric charge associated with a univalent ion. Compare electro-,-on.

    From Wiktionary