question_answer

If bromine atom is in the form of say two isotopes \[{}_{35}B{{r}^{79}}(49.7%)\] and \[{}_{35}B{{r}^{81}}(50.3%)\], then find the average atomic mass of bromine atom.

A) \[81.006\text{ }amu\]

B) \[82.005\text{ }amu\]

C) \[80.006\text{ }amu\]

D) \[79.008\text{ }amu\]

E) None of these