Filling of Electrons in Molecular Orbitals

Rules of filling of electrons in molecular orbitals :-

1. Electrons enters molecular orbitals in the order of their increasing energies i.e. , the lowest energy molecular orbital will be filled first .
2. Each molecular orbital can accommodate a maximum of two electrons with opposite spin according to Pauli's exclusion principle .
3. It obeys Hund's rule as well according to which , whenever two equal energy molecular orbitals are available , electron prefer to remain unpaired .
4. Electrons that are actually present in combining of atoms are placed at a time into molecular orbital to obtain the electronic configuration of the molecule .

The electrons are filled in the energy shell diagram according to the above rules . You can understand the making of energy shell diagrams via you tube as this is a practical process and can't be understood by just reading .

Comment down your queries 

Share to spread knowledge and stay tuned .