Khan Academy

The history of atomic chemistry (K-A)

Absorption and emission-video (K-A)

Bohr model energy levels (derivation using physics)-video (K-A)

Bohr model energy levels-video (K-A)

Bohr model radii (derivation using physics)-video (K-A)

Bohr model radii-video (K-A)

Bohr's model of hydrogen-(link) (K-A)

Emission spectrum of hydrogen-video (K-A)

Introduction to light (K-A)

Light: Electromagnetic waves, the electromagnetic spectrum and photons-link (K-A)

Photoelectric effect-link (K-A)

Photoelectric effect-video (K-A)

Heisenberg uncertainty principle-video (K-A)

Spectroscopy: Interaction of light and matter-link (K-A)

Quantum numbers for the first four shells-video (K-A)

Quantum numbers-video (K-A)

The quantum mechanical model of the atom-link (K-A)

Electron configuration for d block element (K-A)

Electron configuration for f block element Nd (K-A)

Electron configurations 2 (K-A)

Electron configurations for the first period (K-A)

Electron configurations for the second period (K-A)

Electron configurations for the third and fourth periods (K-A)

Electron configurations in the 3d orbitals (K-A)

Introduction to electron configurations