Greenhouse effect Whiteboard exercise Play

Groups in the periodic table Student activity Play

Haber process for the synthesis of ammonia Animation Play

Half-life Student activity Play

Halogen lights Illustration Play

How to handle gases in a chemistry laboratory Student activity Play

How to write the numbers of molecules and numbers of atoms in a molecule Student activity Play

Hybridisation in the ammonia molecule Animation Play

Hydrogen atoms on oxygen or nitrogen are usually not coupled to their neighbours Animation Play

Hydrogen bonding Student activity Play

Hydrogen bonds Student activity Play

Is the synthesis of ammonia spontaneous? Animation Play

Isotopes Animation Play

Le Chatelier's principle for gas reactions Student activity Play

Lewis structures (dot diagrams) for atoms Animation Play

Light bulbs Slideshow Play

Liquefying of oxygen and nitrogen Illustration Play

Liquid nitrogen Slideshow Play

Lone electron pairs affect the shape of the molecule (1) Student activity Play

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

Mass spectra of diatomic elements Animation Play

Mass spectra of the elements Student activity Play

Maxwell–Boltzmann distribution of molecular energies Student activity Play

Melting Student activity Play

Mixing of atomic orbitals: sp2 hybridisation Student activity Play