GENERAL KNOWLEDGE

Detailed explanation-1: -Nuclides which have the same number of proton are called isotopes. When nuclides have same mass number are called isobars. When nuclides have same number of neutron are called isotones . When the elements have same molecular formula but have different arrangements of atom in space are called isomers.

Detailed explanation-2: -As the molecular formula of isomers remains the same so the molecular mass of the isomers also remains the same.

Detailed explanation-3: -Nuclei with the same number of neutrons but a different atomic number are called isotopes. Nuclei with the same mass number are called isotones.