What is the difference between mass number and atomic mass?

Last updated: 7/4/2022

What is the difference between mass number and atomic mass? Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both relatively small. Because the mass of an electron is one, the mass number approximates the atomic mass. O Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both approximately one. Because the mass of an electron is also one, the mass number approximates the atomic mass. O Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both approximately one. Because the mass of an electron is small relative to that of a proton or neutron, the mass exactly equals the atomic mass. O Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both approximately one. Because the mass of an electron is small relative to that of a proton or neutron, the mass number approximates the atomic mass.