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Learn about the electron mass , its value in different units, its dimensional formula, and its significance in physics. Find out how the electron mass affects atomic structure, quantum mechanics, relativity, and various practical applications. Charge of Electrons Electron is a negatively charged particle and the charge on the electron is negative 1.602 × 10-19 coulomb. Mass of Electrons Mass of an electron is 9.10938356 × 10-31 kilograms. Mass of Electron is neligible as compared to the mass of Protons and Neutrons. The electron has mass m_e = 9.1095\times 10^ {-28} {\rm\ g}=9.1095\times 10^ {-31} {\rm\ kg} = 0.51100 {\rm\ MeV}/c^2, where c is the speed of light. See also: Electron , Electron Charge In this article, we will learn about the mass of an electron in kg, grams, amu and eV. We will also learn the rest mass of an electron along with some FAQs