The atomic numbers of isobars are different and the mass numbers are the same.
The number of electrons, protons and neutrons in isobars varies.
The atomic weights of isobars are almost the same.
The chemical properties of isobars vary as the atomic numbers vary.
The physical properties of isobars also vary.
Along with the nuclear structure of isobars, the structure outside the nucleus is also different. Due to differing nuclear structures, their radioactive properties may be different.
Example – C-14 exhibits radioactivity while N-14 is not radioactive.
Elements in the periodic table are placed in increasing order of their atomic numbers. Therefore, the positions of isobars in the periodic table are different.