The relative atomic masses on the periodic table include the contribution from different isotopes by taking a weighted average of the different isotopes' masses based on their abundance. Chlorine, for example, has two isotopes: chlorine-35 and chlorine-37. Three-quarters of the chlorine found in ...
(usually abbreviated to amu), also known as daltons. a single element can have several isotopes. to calculate atomic weight it is necessary to consider the masses of isotopes . the percentage of isotopes may differ. while calculating atomic weight, isotope relative abundance and isotope mass have...