**Nitrogen molecule** (N_{2}) is the electronic configuration of nitrogen (Z=7) in the ground state is 1s^{2}2s^{2}2p_{x}^{1}2p_{y}^{1}2p_{z}^{1}. Therefore, the total number of electrons present in nitrogen molecule (N_{2}) is 14. These 14 electrons can be accommodated in the various molecular orbitals in order of increasing energy.

**N _{2} : KK (σ_{1s})^{2} (σ_{2s})^{2} (π_{2px})^{2} (π_{2py})^{2} (π_{2pz})^{2}**

Here, **(σ _{1s})^{2} (σ_{2s})^{2} **part of the configuration is abbreviated as KK, which denotes the K shells of the two atoms. In calculating bond order, we can ignore KK, as it includes two bonding and two antibonding electrons.

The molecular orbital energy level diagram of N_{2} is given in Figure.

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