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

Rectangles Student activity Play

Reduction formulas for the cosine Animation Play

Reduction formulas for the sine Animation Play

Relative atomic mass Whiteboard presentation Play

Relative atomic mass Student activity Play

Relative atomic mass Class activity Play

Relative molecular mass Student activity Play

Roentgen spectra of elements – characteristic radiation Student activity Play

Roots of roots – finding true equations Whiteboard exercise Play

Roots of roots – more examples of true or false equations Whiteboard exercise Play

Rounding large numbers Whiteboard exercise Play

Rutherford's atomic model Student activity Play

Rutherford's experiment Animation Play

Rutherford's experiment Animation Play

Rutherford's experiment Whiteboard exercise Play

Rutherford's model of the atom Animation Play

Salts of strong acids and weak bases Whiteboard exercise Play

Salts of weak acids and weak bases Student activity Play

Saturated and unsaturated compounds Animation Play

Semiconductor Animation Play