Calculate the Average Atomic Mass Of Bromine Atom.

Answer: The mass of one atom of an element is called its atomic mass. The isotopic abundance is factored into the average atomic mass.

Bromine isotope with atomic mass 79 u=49.7%

Therefore, contribution of ³⁴Br₇₉ to atomic mass = 79×49.7 / 100= 39.26 u

Bromine isotope with atomic mass 81 u=50.3%

Therefore, contribution of ³⁴Br₇₉ to atomic mass = 81×50.3 / 100= 40.64 u

As a result, the bromine atom’s average atomic mass,

39.26+40.64=79.7 u