Alcohols containing one hydroxyl group Animation Play

Alkaline earth metals. Group 2 Class activity Play

Alkaline earth metals. Group 2 Whiteboard presentation Play

Alkalinity of hydroxides Animation Play

Ammonia – a weak base Animation Play

An example of a proof Student activity Play

Analytical tests in organic chemistry Class activity Play

Analytical tests in organic chemistry Whiteboard presentation Play

Animal-like and plant-like protists Student activity Play

Arrangement of chemical elements in the periodic table Student activity Play

Arrangement of the elements in the periodic table Whiteboard exercise Play

Arrangements Student activity Play

Arrangements – ten explorers Whiteboard exercise Play

Atomic mass of an element Animation Play

Atomic mass of an element Student activity Play

Atomic masses in the periodic table Student activity Play

Atomic number and mass number Student activity Play

Atomic radii of the s-block elements Student activity Play

Atomic radius Student activity Play

Avogadro's number Student activity Play

Bases (1) Student activity Play

Basic periods of trigonometric functions Student activity Play

Basic properties of probability Student activity Play

Beats Student activity Play

Beats Animation Play