Ratio of two quantities of different kinds Whiteboard exercise Play

Ratio of two quantities of the same kind Student activity Play

Ratio of two quantities of the same kind Simulation Play

Reaction conditions and enthalpy change Slideshow Play

Reaction course under changing environmental conditions Animation Play

Reaction mechanisms Student activity Play

Reaction mechanisms Whiteboard exercise Play

Reaction of sodium with water Animation Play

Reaction of sodium, magnesium and aluminium with water Animation Play

Reaction of transition metals with hydrochloric acid Animation Play

Reactions between Group 1 and 2 metals and water Student activity Play

Reactions between Period 3 elements and water (1) Student activity Play

Reactions involving phase changes Animation Play

Reactions of metals with water and steam Student activity Play

Reactivity of the alkaline-earth-metals and their electron configurations Animation Play

Reading from graphs Student activity Play

Reading from graphs Whiteboard exercise Play

Real gases Student activity Play

Recent changes in the Earth's temperature Slideshow Play

Recognising reducing agents Simulation Play

Recognising reducing agents Student activity Play

Recombination in bacteria Animation Play

Recycling of aluminium Slideshow Play

Recycling of aluminium Whiteboard exercise Play

Recycling of paper, glass and metal Student activity Play