A constant source of voltage Student activity Play

A family of transition metals Animation Play

Abundance of chemical elements in nature Student activity Play

Abundance of elements in nature Slideshow Play

Abundance of the elements in the crust and in the whole Earth Animation Play

Acids and alkalis Class activity Play

Air resistance Student activity Play

Alloys of iron Slideshow Play

Aluminium Class activity Play

Aluminium Whiteboard presentation Play

Aluminium oxide has many faces Slideshow Play

Amorphous solids Student activity Play

Application of transition elements and their compounds Slideshow Play

Arrangement of chemical elements in the periodic table Student activity Play

Arranging metals according to increasing reactivity Student activity Play

Arranging metals according to increasing reactivity Animation Play

Assigning electrons to atomic orbitals Student activity Play

Atoms Student activity Play

Attraction and repulsion Student activity Play

Avogadro's number Student activity Play

Avogadro's number (2) Student activity Play

Basic oxygen process Animation Play

Biologically important transition metal complexes Student activity Play

Boiling and condensing water Whiteboard exercise Play

Boiling point Student activity Play