The atomic mass of an atom is an empirically measured property, which is equivalent to the sum mass of protons, neutrons, and electrons that make up the atom (with a small adjustment for nuclear binding energy).
Also know, is atomic mass and mass number the same?
Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element’s isotopes. The mass number is a count of the total number of protons and neutrons in an atom’s nucleus.
Secondly, what is the relation between atomic number and mass number of an atom?
The number of protons determines an element’s atomic number and is used to distinguish one element from another. … Together, the number of protons and the number of neutrons determine an element’s mass number.
What is the value of 1 amu?
In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass. This is approximately 1.67377 x 10 –27 kilogram (kg), or 1.67377 x 10 –24 gram (g). The mass of an atom in AMU is roughly equal to the sum of the number of protons and neutrons in the nucleus.