A diagram of the formation of carbon-14 and its cycle in the atmosphere Illustration Play

A proof for rapid exchange of hydrogen atoms in hydroxyl groups Slideshow Play

A thickness measuring device Animation Play

Ability to react with metals Animation Play

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

Acids (2) Student activity Play

Acids and alkalis Class activity Play

Across the periodic table Student activity Play

Actinium series Chart Play

Actinium series Illustration Play

Additional information contained in chemical equations Student activity Play

Alkaline earth metals Slideshow Play

Alkaline earth metals Student activity Play

Alpha decay Animation Play

Alpha decay Whiteboard exercise Play

Alpha radiation Animation Play

Aluminium alloys Student activity Play

Antimatter Animation Play

Application of magnesium hydroxide Slideshow Play

Application of radioactive isotopes Student activity Play

Application of radioactive isotopes Whiteboard exercise Play

Application of radioactivity Whiteboard presentation Play

Application of radioactivity Class activity Play

Are all atoms of the same element identical? Student activity Play

Arranging metals according to increasing reactivity Student activity Play