Water, nitrogen and lead Slideshow Play

Waves in liquids and solids Animation Play

Weighing out a defined mass of a solid Animation Play

What are chemical compounds? Student activity Play

What are the differences between the three physical states of the same type of matter? Student activity Play

What is a solid of revolution? Student activity Play

What is entropy? Animation Play

What is the structure of solids? Whiteboard exercise Play

What is the structure of solids? Student activity Play

Why do magnesium and chlorine form the compound MgCl2, but not MgCl? Animation Play

Why don't solids change their shape spontaneously? Animation Play

Why some ionic compounds do not exist Student activity Play

X-ray radiation Glossary Play

X-ray radiation Student activity Play

 What is a solid of revolution? Whiteboard exercise Play