Question

differenciate between isotopes and isober explain it

Answer 1

Isotopes are two atoms with the same number of protons, but a different number of neutrons. Because they have the same number of proton they are atoms of the same element, but with different masses. ... Isomers are two molecules with the same atoms joined together in a different shape.

Answer 2

the elements having same atomic no. but different mass number i.e. (atomic mass) are called as Isotopes. eg.
protium, duetarium, tritium .
The elements having different atomic number but same atomic mass are called as Isobars .