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
Question
If bromine atom is available in the form of, say, two isotopes 35𝐵𝑟 79 (49.7%) and 𝐵𝑟 35 81 (50.3%), calculate the average atomic mass of bromine atom.
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