Reactivity of the alkali metals and their electron configuration Animation Play

Reactivity of the alkaline-earth-metals and their electron configurations Animation Play

Reactivity of the halogens Student activity Play

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

Redox reactions Animation Play

Redox reactions around us Student activity Play

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

Relative abundance of isotopes and mass spectra Student activity Play

Relative mass and charge Animation Play

Resonance energy for benzene Animation Play

Resonance structures for benzene Animation Play

Resonance structures of benzene Student activity Play

Roentgen spectra of elements – characteristic radiation Student activity Play

Roentgen spectra of elements – characteristic radiation Whiteboard exercise Play

Roentgen's experiment Animation Play

Rutherford's atomic model Student activity Play

Rutherford's experiment Animation Play

Rutherford's experiment Whiteboard exercise Play

s-block elements Animation Play

Salts of strong acids and weak bases Student activity Play

Scanning electron microscope Slideshow Play

Scanning electron microscope Slideshow Play

Semiconductor Animation Play

Semiconductor diode Student activity Play