Concept explainers
Interpretation:
Calculate the atomic weight of an element from the masses and abundances of its isotopes.
Concept Introduction:
Isotopes:
Atoms of same element have the same number of proton but different number of neutrons in its nucleus.
Ex:
These all are isotopes of
Due to presence of different isotopes of an element we have to calculate
Answer to Problem 4CO
Solution: Average atomic mass (atomic weight)
Explanation of Solution
Due to isotopes of an element we cannot define atomic mass of the element. Each isotope is present in different amounts.
Hence we have to define average atomic mass.
Average atomic mass
Let
Average atomic mass
Hence average atomic mass (atomic weight)
Where
Abundance fraction of second isotopes.
Average atomic mass (atomic weight)
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