Bromine occurs in nature mainly in the form of two isotopes `._(35)^(79)Br and ._(35)(81)Br`. If the abundance of `._(35)^(79)Br` isotope is 49.7 ^% and that of `._(35)^(81)Br` isotope is 50.3 %, calculate the average atomic mass of bromine.

Explanation

Percentage of Br-79 isotope = 49.7
Percentage of Br isotope = 50.3
Average atomic mass of bromine = `((79xx49.7)+(81xx50.3))/((49.7+50.3))`
`=(39269.3+4074.3)/(100)=(8000.6)/(100)=80.006 mu`