Question

Why is the mass of a hydrogen atom almost equal to the mass of a proton?​

Answer 1

Mass of Proton – The mass of a proton is equal to that of the hydrogen atom. A hydrogen atom consists of one electron and one proton. As the mass of an electron is considered to be negligible therefore it can be said that the mass of hydrogen atom is equal to the mass of a proto

Answer 2

Proton is a positively charged particle and has the following physical properties: Mass of Proton – The mass of a proton is equal to that of the hydrogen atom. ... As the mass of an electron is considered to be negligible therefore it can be said that the mass of hydrogen atom is equal to the mass of a proton.