^Isobars

Are the atoms:

having same:  A, N_N, Physical properties

But different: Element, Z, n_e, n_p , Chemical properties

Examples:    1.  ₁H³ & ₂He³                       2. ₆C¹⁴ & ₇N¹⁴

3.  ₈O¹⁷ & ₉O¹⁷                     4. ₁₁Na²², ₁₀Ne²²

5. ₂₀Ca⁴⁰ & ₁₈Ar⁴⁰                    6. ₁₇Cl³⁷ & ₁₆S³⁷