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If Bromine atom is available in the form of say, two isotopes ._(35)^(79)Br(49.7%) and ._(35)^(81)Br(50.3%) Calculate the average atomic mass of Bromine atom.

Answer»

Solution :It is GIVEN that two isotopes of Bromine are 79/35 BR(49.7%) and 81/35 Br(50.3%). Then, the average atomic MASS of Bromine atom is given by
`79xx(49.7)/(100)+81xx(50.3)/(100)`
`= (3926.3)/(100)+(4074.3)/(100)`
`=(8000.6)/(100)`
`= 80.006 U`


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