Question

what is isotopes and iso bars

Answer 1

Isotopes: The atoms having same atomic number but different atomic mass number are called Isotope. 

Isobars: Nuclides having the same mass number but having the different Proton/Atomic number are called Isobar.

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Answer 2

isotopes :the atom having same atomic number but different atomic mass number are called isotopes
isobars :nuclides having the same mass number but having the different atomic number are called isobars