According to the moleular orbital theory, all atomic orbitals combine to form molecular orbital by `LCAO` (linear combination of atomic orbitals) method When two atomic orbitals have additive (constructive) method When two atomic orbitals have additive (constructive) overlapping they form bonding molecular orbitals `(BMO)` which have lower energy than atomic orbitals whereas when atomic orbitals overlap subtractive higher energy antibonding molecular orbitals `(ABMO)` are formed Each `MO` occupies two electrons with opposite spin Distribution of electrons in `MO` follows Aufbau principle as well as Hund's rule `MO` theory can successfully explain the magnetic behaviour of molecules
`O_(2)^(2-)` will have .

Options

A. bond order equal to `H_(2)` and diamagnetic
B. bond order equal to `H_(2)` but diamagnetic
C. bond order equal to `N_(2)` and diamagnetic
D. bond order higher than `O_(2)`

Answer

A

Explanation

Bond order of `O_(2)^(2-) =1` and is diamagentic
Bond order of `H_(2) =1` and is diamagnetic .