Qaybta hoose ka akhriso, ka dibna ka jawaab su'aasha ka dib luqadda la mid ah sida marinka: Passage: The mass invariant of an electron is approximately 9.109×10−31 kilograms, or 5.489×10−4 atomic mass units. On the basis of Einstein's principle of mass<unk>energy equivalence, this mass corresponds to a rest energy of 0.511 MeV. The ratio between the mass of a proton and that of an electron is about 1836. Astronomical measurements show that the proton-to-electron mass ratio has held the same value, as is predicted by the Standard Model, for at least half the age of the universe. Electrons have an electric charge of −1.602×10−19 coombs, which is used as a standard unit of subatomic particles, and is also called the elementary elementary elementary particle. This has a relative uncertain standard charge of 2.210−8. Within the limits of the mass<unk>energy equivalence, this mass corresponds to a rest energy of 0.511 MeV. The ratio between the mass of a proton and that
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