Question

if bromine atom is available in the form of two isotopes 79/35 Br (49%) and 81/35 Br (51%) , calculate the average atomic mass of bromine atom.

Answer 1

average atomic mass =
mass of Ist isotope ×it's % +mass of 2nd isotope ×it's %÷100
= 79×49+81×51÷100
= 3871+ 4131÷100
=8002÷100
= 80.02 is the average atomic mass

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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