Electron Orbitals and Energy Levels

The video tutorial explains how electrons are arranged in atoms, focusing on the principle energy levels and sub-levels (s, p, d, f) to achieve the lowest energy state. It describes the energy hierarchy among these sub-levels and the capacity of orbitals to hold electrons. The tutorial uses hydrogen and oxygen as examples to illustrate electron configuration, showing how electrons fill the available orbitals in order of increasing energy.

Describe the electron configuration of oxygen with its eight electrons.

How do electrons fill the 2p sub-level after the 2s orbital is full?