Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.

In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

In this interactive and animated object, learners use solubility rules to predict when an insoluble ionic compound will precipitate in a double replacement reaction. Step-by-step examples are given.

In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.