Question

what are isotopes?????​

Answer 1

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Answer 2

Isotopes :-

These are elements having same atomic number but different mass number.

Eg:-

There are three isotopes of Hydrogen

=> Protium

=> Protium => Deuterium

=> Protium => Deuterium=> Tritium