Real gases Animation Play

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

Relative atomic mass Class activity Play

Relative atomic mass Whiteboard presentation Play

Relative atomic mass Student activity Play

Relative molecular mass Student activity Play

Relative molecular mass Student activity Play

Removal of inorganic salts from wastewater Animation Play

Replacing soil minerals Student activity Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Roentgen spectra of elements – characteristic radiation Student activity Play

Role of anions in plant cells Slideshow Play

Role of cations in plant cells Slideshow Play

Role of macro-elements absorbed as anions Whiteboard exercise Play

Role of macro-elements absorbed as anions Student activity Play

Role of macro-elements absorbed as cations Student activity 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

Sample formulae Illustration Play

Saturated and unsaturated compounds Animation Play