Why isotopes have similar chemical properties?

They have similar chemical properties because isotopes of an element have the same number of electrons as an atom of that element. The electron arrangement is the same owing to same chemical properties. However they have different numbers of neutrons, which affects the mass number. read more

Isotopes are the atoms of an element with the same atomic number but different mass number. According to the modern periodic law, the physical and chemical properties of elements are the periodic functions of their atomic numbers. Thus, isotopes of the same elements, having the same atomic numbers, have similar chemical properties. read more