Isotopes of Chlorine

 

Natural Isotopes of Chlorine

Nominal Mass Accurate Mass % Natural Abundance
35 Cl 34.968 75.77
37 Cl 36.965 24.23

 

These two isotopes are used to define the atomic weight of chlorine to be 35.3. These isotopes have the same chemical properties, but, their masses are different.

There are also radioactive isotopes of chlorine, including Cl36.

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