Calculate the bond order of O?  and predict its magnetic property.

As per the molecular orbital theory, two atomic orbitals of oxygen atoms combine to form lower-energy molecular orbital of the oxygen molecule.

• Bond order of the Oxygen molecule = $\frac{1}{2}*(8-4)=2$ , which means a double covalent bond.
• Since O?  also has unpaired electrons, so it is a Paramagnetic molecule.

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