MASS RELATIVELY ATOM (Ar)

Ø It is the comparison between the atomic mass of 1 atom of the other.

Ø In general, some elements of the isotope in the determination of relative atomic mass (Ar) is used the average mass of the isotopes

Ø According to IUPAC, used as a benchmark atom C-12 is 1 / 12 the mass of 1 atom C-12;