Relationship between the atomic structure and the position of elements in periods Animation Play

Relationship between the group number and the number of valence electrons Animation Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative atomic mass Class activity Play

Relative atomic mass Student activity Play

Relative atomic mass Whiteboard presentation Play

Relative atomic mass of magnesium Whiteboard exercise Play

Relative molecular mass Student activity Play

Reversible and irreversible reactions Student activity Play

Rocks originating from magma Animation Play

Roentgen spectra of elements – characteristic radiation Student activity Play

Role of cations in plant cells Slideshow 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

Salts of s-block elements occurring in nature Slideshow Play

Saturated and unsaturated compounds Animation Play

Seawater Slideshow Play

Semiconductor Animation Play

Sensors Animation Play

Shapes of organic molecules Student activity Play