What is the atomic mass of an element?

Answer 1

The atomic mass of an element is the weight of the constituent atomic paraticles in an atom of a given isotope. The atomic weight is the weighted average mass for atoms in a naturally occurring sample of the element.

Almost all of an atom's mass is found in the nucleus, consisting of protons and neutrons.

Answer 2

The Atomic Mass of an element is the mass of an atom or part of an atom. It is normally expressed in unified atomic mass units (u). 12 unified atomic mass units is the mass of one carbon-12 atom (at rest).

Answer 3

The atomic mass of an element is the average mass of an atom of that element, taking into account the different isotopes and their relative abundances. It is typically expressed in atomic mass units (u) and can be found on the Periodic Table below the element's symbol.