Chlorine has two isotopes, viz, Cl - 35 and Cl - 37. Their atomic masses are 35 and 37 respectively. Their chemical properties are same. Where should these be placed in )Iendeleev's periodic table? In different places or in the same place?

Explanation

1. In Mendeleev.s periodic table the elements are arranged in the increasing order of their atomic masses.
2. Therefore, isotopes of Chlorine atom with Cl- 35 and Cl- 37 should be placed in different places in the periodic table.