How does the mass of a proton compare to the mass of:
an atom of Hydrogen

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Solution

Mass of an atom of Hydrogen (H) = 1.67 × 10^-24g
Mass of a proton = 1.67 × 10^-24g
Hence, mass of a proton is similar to the mass of a Hydrogen atom.
This can be understood by knowing that a Hydrogen atom contains a proton and an electron. There is no neutron in Hydrogen atom.
An electron has a negligible mass, so almost entire mass of the Hydrogen atom is because of the proton only.

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