Crystal lattice of covalent compounds Student activity Play

Crystal lattice of NaCl Simulation Play

Curved space Student 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

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

Density and the molecular structure of matter Student activity Play

Determination of formulae of compounds Whiteboard exercise Play

Determining the composition of atomic nuclei Whiteboard exercise Play

Determining the composition of atomic nuclei Student activity Play

Determining the electron configuration on the basis of the periodic table Student activity Play

Determining the empirical formula Student activity Play

Determining the empirical formula Animation Play

Determining the molecular formula Student activity Play

Development of atomic theory. Radioactivity Class activity Play

Development of atomic theory. Radioactivity Whiteboard presentation Play

Diffraction of electrons Whiteboard exercise Play

Diffraction of electrons – the Davisson-Germer experiment Student activity Play