Question

give a brief explanation about isotopes

Answer 1

heya frnd here is your answer isotopes means that atom of same atomic number and different Mass no.
its help in describing the elements property are same but in different ways

Answer 2

ISOTOPES are the atoms which have the same atomic number but different atomic masses, that is , they have the same number of protons but different number of neutrons.
For example,
The three are all isotopes of hydrogen;
Protium. ( 0 neutron )
Deuterium. ( 1 neutron )
Tritium. ( 2 neutron )