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 air resistance and speed Whiteboard exercise Play

Relationship between air resistance and speed Student activity Play

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

Relationships between free energy and metabolic reactions Whiteboard exercise Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative mass and charge Animation Play

Resonance Whiteboard presentation Play

Resonance Student activity Play

Resonance Whiteboard presentation Play

Resonance Class activity Play

Resonance Class activity Play

Resonance energy for benzene Animation Play

Resonance in technology Slideshow 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