Question

What is the name given to atoms 35Cl and 37Cl of chlorine, with the same atomic number, but different masses?

Answer 1

When u have different amount of neutrons in a compound it is called an isotype

Answer 2

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35Cl and 37Cl are called the Isotopes of chlorine.

Isotopes are those elements that having same atomic number that is no. of protons but different mass number that is no. of neutrons.