Whats the difference between atomic mass and mass number?

Answer 1

Atomic Mass is the average of the masses of the naturally existing (i.e. mixture of) isotopes of one specific element.

The atomic mass number is the sum of the protons and neutrons in the nucleus of an atom (specific for one specific isotope).

Answer 2

The mass number for an element includes the total number of protons and neutrons.

So the difference between the mass number and the number of neutrons is the atomic number (number of protons).

Answer 3

the atomic number of an element is the same as the number of protons and electrons. to find the number of neutrons, you subtract the atomic number from the atomic mass.

Answer 4

A neutron is a subatomic particle found in the nuclei of most atoms. Mass number is the sum of protons (atomic number) and neutrons in the nucleus in an atom of a particular isotope.