Relative abundance of isotopes and mass spectra Student activity Play

Relative molecular mass Student activity Play

Relative molecular mass Animation Play

Resonance energy for benzene Animation Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Rupture of the DNA molecule Slideshow Play

Salts of strong acids and weak bases Student activity Play

Salts of strong acids and weak bases Whiteboard exercise Play

Salts of weak acids and weak bases Student activity Play

Saturated and unsaturated compounds Animation Play

Sea water Student activity Play

Sensors Animation Play

Sigma (σ) bond Student activity Play

Sigma (σ) bond Whiteboard exercise Play

Sigma bonds in fluorine molecule Animation Play

Sigma bonds in hydrogen fluoride molecule Animation Play

Size of matter Student activity Play

Size of matter Whiteboard exercise Play

Size of the ozone hole Simulation Play

Sodium hydroxide Animation Play

Solid substances as catalysts in reactions in the gaseous phase Animation Play

Solid-liquid phase change Student activity Play

Solids Student activity Play

Solids Whiteboard exercise Play