Amino acids – the basic units of proteins Student activity Play

Ammonia Animation Play

Amorphous solids Student activity Play

An atom and a nucleus Animation Play

An atom and a nucleus Whiteboard exercise Play

An atom and a nucleus Student activity Play

An electron-proton pair Animation Play

An explosion of atom bomb Illustration Play

Anaerobic respiration Student activity Play

Antiparticles – matter and antimatter Whiteboard exercise Play

Antiparticles – matter and antimatter Student activity Play

Application of diamond Slideshow Play

Application of graphite Slideshow Play

Application of radioactive isotopes Student activity Play

Application of the Würtz synthesis Animation Play

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

Assigning electrons to atomic orbitals Student activity Play

Asymmetric carbon atoms and chirality Animation Play

Atmospheric carbon dioxide Animation Play

Atmospheric carbon dioxide Student activity Play

Atom bomb Student activity Play

Atom bomb Whiteboard exercise Play

Atom – the basic component of matter Animation Play

Atomic and molecular mass Class activity Play

Atomic and molecular mass Whiteboard presentation Play