Intermolecular forces affect the physical properties of matter Student activity Play

Introduction to genetic engineering – DNA isolation Student activity Play

Introduction to genetic engineering – DNA isolation Whiteboard exercise Play

Ionic crystals Student activity Play

Ionising radiation Animation Play

Isolation of DNA from other cell structures Animation Play

Isomerisation of cis-but-2-ene Animation Play

IUPAC names of simple alkyl groups Animation Play

Karyotype Student activity Play

Karyotype; sex chromosomes and sex determination Slideshow Play

Kinetic energy of molecules Animation Play

Kinetic energy of the colliding molecules Animation Play

Lactic acid Slideshow Play

Latent heat of vaporization Whiteboard exercise Play

Latent heat of vaporization Animation Play

Latent heat of vaporization Student activity Play

Latent heat of vaporization Animation Play

Le Chatelier's principle for gas reactions Student activity Play

Lewis dot-and-cross diagram for a hydrogen molecule Animation Play

Lewis dot-and-cross diagram for a water molecule Animation Play

Lewis dot-and-cross diagram of a hydrogen iodide molecule Animation Play

Lewis dot-and-cross diagrams Whiteboard exercise Play

Lewis dot-and-cross diagrams Student activity Play

Lewis structure of a hydrogen molecule Animation Play

Life on land Class activity Play