Proof Animation Play

Properties of elementary particles Student activity Play

Properties of elements Whiteboard exercise Play

Properties of gases Student activity Play

Properties of solids Whiteboard exercise Play

Properties of solids Student activity Play

Quality check Animation Play

Radian Animation Play

Radian measure, introduction Student activity Play

Radians Student activity Play

Radioactive decay Student activity Play

Radius of a circle Whiteboard exercise Play

Radius of inscribed and circumscribed circles Animation Play

Reaction yields Student activity Play

Reactions with water Student activity Play

Reactivity of halogens Student activity Play

Reactivity of halogens Simulation Play

Real gases Student activity Play

Regular polygons – the dodecagon Student activity Play

Regular polyhedron Animation Play

Relationship between the atomic structure and the position of elements in periods Animation Play

Relationship between the period of revolution and the orbital radius Illustration Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative atomic mass Class activity Play

Relative atomic mass Whiteboard exercise Play