Allotropic forms of carbon Student activity Play

Ammonia Animation Play

Amorphous solids Student activity Play

An atom and a nucleus Whiteboard exercise Play

An atom and a nucleus Student activity Play

An atom and a nucleus Animation Play

An electron-proton pair Animation Play

An explosion of atom bomb Illustration Play

Analytical tests Slideshow Play

Antiparticles – matter and antimatter Student activity Play

Antiparticles – matter and antimatter Whiteboard exercise Play

Appearance Student activity Play

Application of radioactive isotopes Student activity Play

Application of the Würtz synthesis Animation Play

Applications of haloalkanes Slideshow Play

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

Assigning electrons to atomic orbitals 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

Atomic number Student activity Play

Atomic number Animation Play

Atomic number and mass number Student activity Play