# Calculate the bond order of O2^+ and O2^-

The bond order shows the number of chemical bonds present between a pair of atoms. The Bond Order Formula can be defined as half of the difference between the number of electrons in bonding orbitals and antibonding orbitals.

Bond order formula is given as below

$Bond\,order = \frac{1}{2}\left [ a-b \right ]$

a = Number of electrons in bonding molecular orbitals.

b = Number of electrons in antibonding molecular orbitals.

(1) O2+1

The number of bonding electrons are 8.

The number of antibonding electrons are 3.

Bond order = 1/2[8 – 3]

Bond order = 1/2[5]

Bond order = 2.5

(2) O2-1

The number of bonding electrons are 8.

The number of antibonding electrons are 5.

Bond order = 1/2[8 – 5]

Bond order = 1/2[3]

Bond order = 1.5