Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Isoelectronic species are defined as molecules or ions that possess the same total number of electrons. According to Molecular Orbital (MO) Theory, species with the same number of electrons share a similar electronic configuration in their molecular orbitals.

Because they contain the same number of bonding ($N_b$) and antibonding ($N_a$) electrons, their calculated bond order using the formula $\frac{N_b-N_a}{2}$ is identical.

Other properties like bond length and bond energy vary because they also depend on the changing nuclear charges of the different constituent atoms.