What is the difference between atomic mass, atomic weight and mass number?
Generally, the terms atomic mass and atomic weight are refered to the same concept. The concept of atomic mass is unique to an element and is defined as the mass of a specific atom relative to 1/12 of the mass of an atom of carbon-12. The term mass number is referred to the averaged atomic mass of all the naturally occuring isotopes of an element based on their relative abundance.The values for mass number can be directly found on the periodic table.
