Reasons for the high reactivity of alkenes Whiteboard exercise Play

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

Reasons for the high reactivity of alkenes (2) Student activity Play

Red giants Whiteboard exercise Play

Red giants Student activity Play

Red giants Animation Play

Reforming of crude oil Student activity Play

Reforming of crude oil Whiteboard exercise Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative molecular mass Animation Play

Relative molecular mass Student activity Play

Resonance energy for benzene Animation Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Rocky planets and gas giants Whiteboard exercise 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

Sensors Animation Play

Sigma (σ) bond Whiteboard exercise Play

Sigma (σ) bond Student activity Play

Sigma bonds in fluorine molecule Animation Play

Sigma bonds in hydrogen fluoride molecule Animation Play