1.

If bromine atom is available in the form of, say two isotopes""_(35)^(79)Br (49.7%) and ""_(35)^(85)Br (50.3%). Calculate the average atomicmass of bromine atom.

Answer»

Solution :The AVERAGE ATOMIC mass of bromine atom
= `(79 xx (49.7)/(100) ) + (81 xx (50.3)/(100))`
= 39.263 + 40.723 = 80.006 = 80
The average atomic mass of bromine atom Is 80 u.


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