Question

The element bromine has the following isotopes 49.7% of bromine-79 and 50.3% of bromine-81. Based on this calculate the average atomic mass of Bromine.

Answer 1

Br 79 = 49.7%
Br 81 = 50.3%
average atomic mass of Br = 79*0.497 + 81*0.503
                                       = 39.263 + 40.743
                                       = 80.006 ≈ 80

Answer 2

_/\_Hello mate__here is your answer--

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The average atomic mass of bromine

={ (79 x 49.7)+ (81 x 50.3) }/100

= (3926.3 + 4074.3)/100

= 8000.6/100

= 80 u

I hope, this will help you.☺

Thank you______❤

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