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

Abundance of chemical elements in nature Student activity Play

Abundance of chemical elements in nature Whiteboard exercise Play

Abundance of elements in nature Slideshow Play

Abundance of noble gases in the atmosphere Slideshow Play

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

Abundance of the principal elements in the Universe Slideshow Play

Actinium series Illustration Play

Actinium series Chart Play

Alpha decay Whiteboard exercise Play

Alpha decay Animation Play

Alpha radiation Animation Play

Antimatter Animation Play

Application of radioactive isotopes Whiteboard exercise Play

Application of radioactive isotopes Student activity Play

Application of radioactivity Class activity Play

Application of radioactivity Whiteboard presentation Play

Are all atoms of the same element identical? Student activity 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

Benefits and risks of nuclear energy Slideshow Play