Atomic masses do not include masses of electrons is the statement that is true about atomic mass.
What is atomic mass?
It is the sum of the mass of all the protons as well as the neutrons that are present inside the nucleus. It is used to consider the total mass of the atom because electrons have a very negligible mass as compared to protons and neutrons.
Atomic mass = total number of protons present in the nucleus + total number of neutrons present in the nucleus of an atom
While the atomic number represents only the number of the protons present in the nucleus, for example, the atomic number of the carbon atom is six
For example, the atomic mass of the carbon atom is 12 because a single carbon atom has 6 protons as well as 6 neutrons.
Atomic masses do not include masses of electrons is the true statement about atomic mass.
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