Radioactive decay Student activity Play

Rational expressions and their decomposition Whiteboard exercise Play

Reaction of aqua ions with carbonates Student activity Play

Reaction of metal ions with alkalis Student activity Play

Reaction with sodium hydroxide Animation Play

Reaction yields Student activity Play

Reactions in the gaseous phase Student activity Play

Reactions of sugars Student activity Play

Reactions of the carboxyl group Student activity Play

Rectangles Student activity Play

Relationship between Kp and Kc Student activity Play

Resonance structures for benzene Animation Play

Resonance structures of benzene Student activity Play

Resultant force and component forces Animation Play

Resultant moment of forces Animation Play

Reversible reactions and chemical equilibrium Whiteboard presentation Play

Reversible reactions and chemical equilibrium Class activity Play

Rolling down an inclined plane Student activity Play

Rotation versus the position of equilibrium Whiteboard exercise Play

Rotation versus the position of equilibrium Student activity Play

Rotation versus the position of equilibrium Slideshow Play

Salts Whiteboard presentation Play

Salts Class activity Play

Scalar-multiple hunting Student activity Play

Secondary treatment Animation Play