Question

what is nuclear mass and atomic mass? can someone explain?

Answer 1

Speaking in terms of definition, Nuclear Mass, is the mass of the nucleus in an atom and Atomic mass refers to the mass of The complete Atom.

The Atomic mass of the atom will include the mass of the electrons,
The Nuclear Mass is the mass of the Nucleus.

Now I look at it practically,
The Nucleus includes Neutrons and Protons. Electrons are in the outer shell.

So Atomic mass = Nuclear Mass + Total mass of Electrons.

Since the mass of the Electrons is very small compared to the mass of protons and neutrons, \[Nuclear Mass \approx Atomic Mass\]
Nuclear Mass is approximately Equal to Atomic Mass

Answer 2

thanks!

Answer 3

Nuclear mass is the mass of nucleus, consisting of proton and neutron(their mass is really approximately equal). Atomic mass is the mass of atom, consisting of nucleus and electron around it. since the mass of electron is negligible compared to the mass of proton and neutron, the nuclear mass is approximately equal to the atomic mass.