Final answer:
Chlorine has two isotopes, chlorine-35 and chlorine-37, with different abundances. Calculating the average relative atomic mass involves understanding the contributions of each isotope.
Explanation:
Chlorine has two isotopes: chlorine-35 and chlorine-37. The abundance of these isotopes naturally is 75% chlorine-35 and 25% chlorine-37. Calculating the average relative atomic mass for chlorine involves considering the mass contributions of each isotope.
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