Atomic Structure: Strategy on Order of Filling Orbitals

In the previous blogpost, i discussed about the 3 rules of filling electrons in atomic orbitals and they are:

• Aufbau Principle
• Pauli Exclusion Principle
• Hund’s Rule of Multiplicity

From the survey of my weekly JC1 A-Level H2 Chemistry Tuition Classes, i also realised that many students are confused about the order of filling orbitals, when they first hear it from their teacher / lecturer in Junior Colleges (JCs) lectures as well as school tutorials.

Today, i will be sharing with you through a video, on the strategy of the Order of Filling Orbitals.

Length of video: 3.22 mins

Link to video: http://www.youtube.com/watch?v=P5iCRKxd37Q

PS: Feel free to leave me a comment OR forward this video to your friends

Note that the energy level of 4s orbital (unfilled state) is lower in energy as compared to the 3d orbitals. Therefore during the filling of orbitals, electrons will occupy the 4s orbital first, fill it up, before filling the 3d orbitals.

Related Articles:

• Atomic Structure: Number of Orbitals & Electrons in Quantum Shells
• Atomic Structure: Filling of Orbitals
• Atomic Structure: Shapes of Atomic Orbitals
• Atomic Structure: 3 Rules of Writing Electronic Configurations of Atoms
• Electronic Configuration of Atoms – Part 2 New!