Chlorine has two isotopes: () and (). What is the relative atomic mass of chlorine?
Answer and explanation
Correct answer: B.
- Step 1: Relative atomic mass is the abundance-weighted mean mass number.
- Step 2: .
Answer
.
Why not the others: : takes the simple mean of and , ignoring abundance. : reverses the abundances ( of and of ). : uses the heavier isotope only.
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