2. Atoms & Elements

How is the average atomic mass of an element calculated?

Element A has two isotopes. The first isotope is present 24.01% of the time and has a mass of 131.96 amu. The second isotope has a mass of 113.66 amu. Calculate the atomic mass of element A.

Given the mass spectrum data of an element with isotopes having masses of 10 amu (20% abundance), 11 amu (50% abundance), and 12 amu (30% abundance), calculate the atomic weight and identify the element.

How is the average atomic mass of an element calculated?

How is the atomic mass of bromine calculated given its isotopes, Br-79 with 51% abundance and Br-81 with 49% abundance?