Question

Would you place the two isotopes of chlorine in different slots because of their different atomic masses or in the same slot due to similar chemical properties?Justify your answer.

Answer 1

In the modern periodic table, all the known elements are arranged in the increasing order of atomic number but not on the basis of atomic mass. Isotopes of an element have same atomic number but different atomic mass. Hence, the two isotopes of Cl having same atomic number are placed at same position or slot.