Khan Academy Static

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.

10331_Molecular_mass_and_molecular_weight.html

10332_Common_polyatomic_ions.html

10330_Empirical_molecular_and_structural_formulas.html