Relative abundance of isotopes and mass spectra Student activity Play

Relative mass and charge Animation Play

Reproduction in reptiles Student activity Play

Reproduction in reptiles Whiteboard exercise Play

Resonance energy for benzene Animation 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

Semiconductor diode Animation Play

Semiconductor diode Whiteboard exercise Play

Semiconductors Animation Play

Semiconductors Whiteboard exercise Play

Semiconductors Student activity Play

Shapes of organic molecules Student activity Play

Shells Slideshow Play