Is it easy to distinguish between a physical change and a chemical change? Student activity Play

Isomerisation of cis-but-2-ene Animation Play

John Dalton's atomic theory Animation Play

Kinetic energy of the colliding molecules Animation Play

Le Chatelier's principle Student activity Play

Le Chatelier's principle for gas reactions Student activity Play

Least useful chemical reactions Student activity Play

Lipids – structural elements of membranes Whiteboard exercise Play

Lipids – structural elements of membranes Student activity Play

Macro-elements; trace elements and ultra-trace elements Slideshow Play

Macroelements in the cell Slideshow Play

Major sources of energy Slideshow Play

Mass spectra of diatomic elements Animation Play

Mass spectra of the elements Student activity Play

Mass spectra of the elements Whiteboard exercise Play

Mass spectrometry of elements Student activity Play

Measuring the volume of gas evolved Animation Play

Melting points of oxides of Period 3 elements Animation Play

Mendeleev's table Animation Play

Metalic elements of the soils Whiteboard exercise Play

Metals Student activity Play

Metals easily form cations Student activity Play

Methods for metal extraction Student activity Play

Minerals and ores Student activity Play

Minerals and ores Whiteboard exercise Play