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MCQ
The two common naturally occurring isotopes of chlorine are:
Unit-3 Atomic Structure
A Cl-35 and Cl-37
B Cl-35 and Cl-36
C Cl-36 and Cl-37
D Cl-34 and Cl-36
Explanation

Chlorine exists mainly as Cl-35 (about 75%) and Cl-37 (about 25%).

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