Khan Academy Static

Introduction_to_the_atom

In chemistry, we will often be thinking about the world on a much smaller scale than you can see with the naked eye. Here we will learn about atoms and elements, tiny particles that make up the world around us. What are atoms, and what kind of properties do they have? How do we weigh and count atoms? We will answer those questions in this section!

Compounds_and_ions

There are 118 elements on the periodic table, and often you will see them combine in specific ratios to form compounds. In this tutorial we will learn about the different ways that chemists represent, count, and categorize compounds.

Skill_check_for_atoms_compounds_and_ions

Want to check your knowledge of atoms and compounds? Try a skill check for some quick review and links to related videos!