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Boron is known to have two stable isotopes of atomic masses 10.016g and 11.013g. These isotopes normally exist in nature in proportions of 20% and 80% respectively. From this data, what is the average atomic mass of boron?

Home/ Secondary Schools/Boron is known to have two stable isotopes of atomic masses 10.016g and 11.013g. These isotopes normally exist in nature in proportions of 20% and 80% respectively. From this data, what is the average atomic mass of boron?