The two isotopes of elemental chlorine are:

  1. A. {}_{17}^{35}Cl and {}_{17}^{36}Cl
  2. B. {}_{17}^{34}Cl and {}_{18}^{36}Cl
  3. C. {}_{17}^{35}Cl and {}_{18}^{37}Cl
  4. D. {}_{17}^{35}Cl and {}_{17}^{37}Cl

Correct Answer: D. {}_{17}^{35}Cl and {}_{17}^{37}Cl

Explanation

Naturally occurring chlorine consists of two stable isotopes, Chlorine-35 and Chlorine-37, both having 17 protons[cite: 1].

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