What is the difference between atomic mass and mass number?

Science. There is a difference between the meanings of the chemistry terms atomic mass and mass number. ... The mass number is a count of the total number of protons and neutrons in an atom's nucleus. read more

There is a difference between the meanings of the chemistry terms atomic mass and mass number. One is the average weight of an element and the other is the total number of nucleons in the atom's nucleus. read more

The difference is that one is a count of the protons in an element’s nucleus while the other is a count of both the protons and neutrons. Atomic mass, also atomic weight, is the total weight of an element. read more

• Atomic mass is the mass of an atom. Mass number means the total number of neutrons and protons (nucleons) in a nucleus of an atom. • Mass number is an integer value whereas the atomic mass often is a decimal value. read more