Question

O2 bond order with figur
e

Answer 1

Now in the diagram, all the orbitals without (*) are bonding MO, while those with (*) are anti bonding MO.

Now, the formula for bond order is:

B.O. = (no. of electrons in bonding molecular orbital - no. of electrons in anti bonding molecular orbital)÷2

For O2+:

B.O. = (10 - 5)/2 = 2.5

Thus, B.O. of O2+ is 2.5