Conservation of mass (1) Whiteboard exercise Play

Covalent bond in chlorine molecule Animation Play

Covalent bond in hydrogen, fluorine and hydrogen fluoride molecules Animation Play

Covalent bonding Whiteboard exercise Play

Covalent bonding (1) Student activity Play

Covalent bonding (2) Student activity Play

Covalent bonding. Part I Whiteboard presentation Play

Covalent bonding. Part I Class activity Play

Covalent bonding. Part II Whiteboard presentation Play

Covalent bonding. Part II Class activity Play

Dalton's atomic theory Animation Play

Dative (coordinate) bond Whiteboard exercise Play

Dative (coordinate) bond Student activity Play

Dative bond in the ammonium cation Animation Play

Decomposition of calcium carbonate Animation Play

Decomposition of calcium carbonate Animation Play

Decomposition of calcium carbonate – a kinetic study Student activity Play

Decomposition of calcium carbonate – a kinetic study Whiteboard exercise Play

Deficiency of macro-elements Whiteboard exercise Play

Definition of stress Animation Play

Democritus' and Dalton's atomic theories Student activity Play

Democritus's atomic theory Animation Play

Densities of straight-chain alkanes Illustration Play

Density Class activity Play

Density Whiteboard presentation Play