Using properties of exponential functions Student activity Play

Using the properties of expected value and population variance Whiteboard exercise Play

Using the properties of exponential functions Whiteboard exercise Play

Using the properties of the scalar product Whiteboard exercise Play

UV radiation Animation Play

Variable oxidation states – manganese Student activity Play

Variable oxidation states – vanadium, cobalt, nickel and zinc Student activity Play

Volume of liquids Student activity Play

Volume of liquids Whiteboard exercise Play

Water – a crystalline structure Student activity Play

Weak acids and weak bases Class activity Play

Weak acids and weak bases Whiteboard presentation Play

What are carboxylic acids? Student activity Play

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

Which amino acids are produced by human organism? Slideshow Play

Why are carboxylic acids acidic? Animation Play

Why are compounds containing the –COOH group called acids? Whiteboard exercise Play

Why are compounds containing the –COOH group called acids? Student activity Play

Why metamorphic rocks have different properties from the parent rocks Animation Play

Why salts of strong acids and strong bases produce neutral solutions Animation Play

Why salts of weak acids and strong bases produce alkaline solutions? Animation Play

Why the volume of a liquid does not depend on the vessel? Animation Play

Why two acids or bases of equal concentrations may have different pHs Student activity Play

X-ray radiation Student activity Play

X-rays Animation Play