Activity 5.2Consider the isotopes of chlorine, Cl-35 and Cl-37.
Would you place them in different slots because their atomic masses are different?
✅ Answer: No. The more fundamental basis of classification is the atomic number.
Or would you place them in the same position because their chemical properties are the same?
✅ Answer: Yes. Isotopes are placed in same position asthey have same chemical properties and atomic number.