Definition of electron

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Photonics Dictionary

electron: A charged elementary particle of an atom; the term is most commonly used in reference to the negatively charged particle called a negatron. Its mass at rest is m_e = 9.109558 x 10^-31 kg, its charge is 1.6021917 x 10^-19C, and its spin quantum number is 1/2. Its positive counterpart is called a positron, and possesses the same characteristics, except for the reversal of the charge.

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