A constant source of voltage Student activity Play

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

Acids and alkalis Class activity Play

Actinium series Illustration Play

Actinium series Chart Play

Additional information contained in chemical equations Animation Play

Additional information contained in chemical equations Student activity Play

Alpha decay Animation Play

Alpha decay Whiteboard exercise Play

Alpha radiation Animation Play

Antimatter Animation Play

Application of radioactive isotopes Student activity Play

Application of radioactive isotopes Whiteboard exercise Play

Application of radioactivity Class activity Play

Application of radioactivity Whiteboard presentation Play

Application of transition elements and their compounds Slideshow Play

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

Arranging metals according to their increasing reducing power Student activity Play

Arranging metals according to their increasing reducing power Simulation Play

Atomic bomb Animation Play

Atomic bomb Student activity Play

Atomic mass of an element Student activity Play

Atomic masses in the periodic table Student activity Play