An average sample of chlorine contains 75.77% chlorine-35, with an atomic mass of 34.969 amu (atomic mass units), and 24.23% chlorine-37, with an atomic mass of 36.966 amu. What is the average atomic mass of chlorine?
1 Answer
Dec 6, 2015
You require the weighted average.
Explanation:
The weighted average is the sum of each individual nuclide, multiplied by its isotopic abundance.
So, we simply do the arithmetic:
Then look at the Periodic Table to see how accurate your result is.
