Drawing the Aufbau Diagram

Aufbau Diagram is drawn using the steps added below,

• Find the number of electrons that is to be filled in the atoms.
• We know that in an atom the
  • s-orbital can hold a maximum of 2 electrons.
  • p-orbital can hold a maximum of 6 electrons.
  • d-orbital can hold a maximum of 10 electrons.
  • f-orbital can hold a maximum of 14 electrons.
• Fill in the first two electrons in the 1s orbital.
• Then follow the “n+l” rule and then fill the electrons accordingly.

Aufbau Principle is the basic method that tells us how the electrons are filled in the atomic orbital. According to the Aufbau Principle, the filling of the electrons in the ground state of an atom follow a basic pattern. This principle tells us that the electrons in the atomic orbital of any atoms are filled in the ascending order of their energy and for finding the energy of the atomic orbital they follow the “n+l” rule.

In this article, we will learn about Aufbau Principle, Features of the Aufbau Principle, its exceptions and limitations in detail.