Question
Question: > Atomic masses of elements are usually fractional because. > >...
Atomic masses of elements are usually fractional because.
A
These are mixtures of isotopes.
B
They contain impurities of other atoms.
C
They are mixtures of isobars.
D
Atomic masses cannot be weighed accurately.
Answer
These are mixtures of isotopes.
Explanation
Solution
: Atomic masses are the average atomic masses of the mixture of isotopes and calculated on the basis of relative abundance.