Reactions of the carboxyl group Whiteboard exercise Play

Reactivity of Group 1 and 2 metals Animation Play

Reactivity of halogens Student activity Play

Reactivity of the alkali metals and their electron configuration Animation Play

Red giants Animation Play

Red giants Student activity Play

Red giants and white dwarves Student activity Play

Red giants and white dwarves Whiteboard exercise Play

Relationship between the group number and the number of valence electrons Animation Play

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

Resolution of optical devices Animation Play

Resolution of optical devices Student activity Play

Rotations Student activity Play

Rotations Whiteboard exercise Play

s-block elements Animation Play

s-Block elements Whiteboard presentation Play

s-Block elements Class activity Play

Sampling frame Student activity Play

Satellites Class activity Play

Seeing other bodies in space Student activity Play

Selecting blood for transfusion Animation Play

Sexual; kin and group selection Animation Play

Shooting stars Animation Play

Simple sugars Animation Play

Spectra of compounds with a carbonyl group Whiteboard exercise Play