Reactivity of halogens Simulation Play

Reactivity of the alkali metals and their electron configuration Animation Play

Real gases Student activity Play

Real gases Animation Play

Reasons for the high reactivity of alkenes (1) Student activity Play

Relative atomic mass Student activity Play

Relative atomic mass Class activity Play

Relative atomic mass Whiteboard presentation Play

Relative molecular mass Student activity Play

Roentgen spectra of elements – characteristic radiation Student activity Play

Rutherford's atomic model Student activity Play

Rutherford's experiment Animation Play

Rutherford's experiment Whiteboard exercise Play

Rutherford's experiment Animation Play

Rutherford's model of the atom Animation Play

Saturated and unsaturated compounds Animation Play

Semiconductor Animation Play

Sensors Animation Play

Shapes of organic molecules Student activity Play

Sigma (σ) bond Student activity Play

Sigma (σ) bond Whiteboard exercise Play

Sigma bonds in hydrogen fluoride molecule Animation Play

Size of matter Student activity Play

Size of the atom Animation Play