Lewis dot-and-cross diagrams Student activity Play

Lewis structure of a hydrogen molecule Animation Play

Lewis structures (dot diagrams) for atoms Animation Play

Light phase and dark phase of photosynthesis Animation Play

Light phase and dark phase of photosynthesis Student activity Play

Limitations of Bohr's atomic model Animation Play

Lipids – the energy source of the cell Student activity Play

Manufacture of hydrogen Whiteboard exercise Play

Markovnikov’s rule Student activity Play

Mass defect Whiteboard exercise Play

Mass defect Student activity Play

Mass percentage of hydrogen in methane Whiteboard exercise Play

Mass spectra of compounds containing chlorine and bromine Student activity Play

Mass spectra of diatomic elements Animation Play

Mass spectra of the elements Whiteboard exercise Play

Mass spectra of the elements Student activity Play

Mass spectrometry of elements Student activity Play

Mass spectrum of boron Whiteboard exercise Play

Mass spectrum of neon Animation Play

Mean bond enthalpies and interactions between bonds Student activity Play

Meaning of the symbol pH Animation Play

Measurement of the volume of gas during decomposition of a substance Animation Play

Melting Student activity Play

Metal alloys Student activity Play

Metals Student activity Play