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An isotope of chlorine has 17 protons and 17 neutrons what is the mass number of that isotope of chlorine?

17 plus 17 equals 34.

However, Chlorine-34 does not exist; the stable isotopes are Chlorine-35 and Chlorine-37.

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First answer by Kenwd0elq. Last edit by Kenwd0elq. Contributor trust: 271 [recommend contributor]. Question popularity: 1 [recommend question].

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