Would you place the two isotopes of chlorine, Cl-35 and Cl-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same ? Justify your answer.

Explanation

In Mendeleev.s Periodic Table the two isotopes of chlorine, Cl-35 and Cl-37 would be placed in different slots because they have different atomic masses. But because of their similar chemical properties which is a more reliable property as it is based on the number of valence electrons, they would be placed in the same slot.