In the early 1880s, the British Scientist John Dalton worked to find the atomic mass of several common elements.

How could knowing the atomic mass of an element help a chemist do his or her work?

A. The atomic mass could be used to convert that element into another element.

B. The atomic mass could be used to identify an element.

C. The atomic mass could be used to calculate the number of isotopes formed by the element.