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

Density of gases Student activity Play

Density of hydrogen Animation Play

Determining the composition of atomic nuclei Student activity Play

Determining the composition of atomic nuclei Whiteboard exercise Play

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

Determining the empirical formula Animation Play

Determining the empirical formula Student activity 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

Discovery of noble gases Illustration Play

Dispersion forces in halogens Animation Play

Dissolving ionic compounds in water Student activity Play

Do noble gases form compounds? Student activity Play

Do noble gases form compounds? Whiteboard exercise Play

Does a chemical compound have a constant composition? Student activity Play

Early atomic theories Class activity Play