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Q. Mass of a hydrogen atom is how many time the mass of an electron?
Answer: 1837
Notes: The mass of 1 hydrogen atom is estimated to be equal to the mass of a proton, which is equal to 1 AMU (Atomic Mass Unit). A hydrogen atom has only a proton in its nucleus. As the mass of an electron is 1/1837 times the mass of a proton (the mass of a proton is 1 AMU), therefore mass of a hydrogen atom is 1/1837 time the mass of an electron.

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