In this animated object, students examine the role equilibrium plays in everyday life. Formulas are presented in an interactive way.

Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.