Ability to react with metals Animation Play

Absorption of light by transition metal ions Animation Play

Abundance of chemical elements in nature Student activity Play

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

Acid dissociation constant and pH (1) Student activity Play

Acid dissociation constant for ethanoic acid Animation Play

Acid dissociation constant for lactic acid Animation Play

Acid dissociation constant Ka Student activity Play

Acids (2) Student activity Play

Acids and alkalis Class activity Play

Acid–base reactions in a non-aqueous medium Animation Play

Alkaline earth metals Student activity Play

Alkaline earth metals Slideshow Play

Alkalinity of hydroxides Animation Play

All salts are electrolytes Animation Play

Aluminium chloride Animation Play

Ammonium cation Animation Play

Ammonium nitrate Animation Play

Amphoteric metal hydroxides Animation Play

Application of calcium hydroxide Animation Play

Aqueous solutions of bases Whiteboard exercise Play

Atomic number Student activity Play

Atomic number Whiteboard exercise Play

Balancing chemical equations and stoichiometry Animation Play

Base dissociation constant Kb (1) Student activity Play