Aufbau Principle

What is Aufbau Principle in Chemistry?

The Aufbau Principle in Chemistry is the basic principle that is used to fill the electrons in the atomic orbitals of any atom. This theorem tells us the order in which the electrons are filled in the atomic orbital.

Who Gave Aufbau Principle?

The Aufbau Principle was given by the famous Danish physicist Niels Bohr in 1920.

What is Pauli’s Exclusion Principle?

The Pauli’s Exclusion Principle states that in an atom no two electrons have all four quantum number the same. Atleast, one of the quantum number is different for all electrons in the atom.

What is “n+l” rule?

The “n+l” rule is the rule that states the energy of an orbital  depends on the sum of Principal Quantum Number(n) and the Azimuthal Quantum Number(l). this rule is called the (n+l) rule.

What are the Exception to the Aufbau Principle?

The Exception to the Aufbau Principle are,

• Electronic Configuration of Chromium Cr[24]
• Electronic Configuration of Copper Cu[29]

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.