Pythagorean theorem in 3-dimensional space Whiteboard exercise Play

Pythagorean theorem in 3-dimensional space Student activity Play

Questions about the physical changes Whiteboard exercise Play

Radiation of heat Student activity Play

Radiation of solids Student activity Play

Reaction of potassium bromide and potassium iodide with sulphuric acid Animation Play

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

Reactions between halogens and metals Student activity Play

Reactions between metal halides and concentrated sulphuric acid Student activity Play

Reactions between metal halides and sulphuric acid Animation Play

Reactions occurring on the surface of a solid catalyst Student activity Play

Reactions occurring on the surface of a solid catalyst Whiteboard exercise Play

Refraction of light Student activity Play

Regular polyhedron Animation Play

Relation between enthalpy of solution and enthalpy of hydration Whiteboard exercise Play

Relationship between volumes of similar solids Whiteboard exercise Play

Relationship between volumes of similar solids Student activity Play

Riddles about 3-D shapes Student activity Play

Riddles about 3-D shapes Whiteboard exercise Play

Right prisms Whiteboard exercise Play

s-Block elements Whiteboard presentation Play

s-Block elements Class activity Play

Salts of carboxylic acids Student activity Play

Sample compounds Slideshow Play

Sections of a cube Student activity Play