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Discuss average atomic mass with an exam...

Discuss average atomic mass with an example.

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Atomic mass of most of the elements are fractions, because of presence of isotopes (ex:- Cl-35 and Cl-37). To calculate average atomic mass, of different isotopes and their relative abundances are to be considered.
Ex:- Chlorine contains Cl-35 and Cl-37 in the ratio `3:1`
`therefore` average atomic mass of chlorine `=(35 xx 3 + 37 xx 1)/4 = 35.5`
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