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

In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.

Learners complete an exercise to match chemical formulas with the names of binary compounds, tertiary compounds, and ions.

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

In this screencast, learners examine the properties of the hydrogen bond and how the bond changes when hair is shampooed or styled.

In this screencast, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this interactive object, learners calculate the amount of heat evolved or absorbed in chemical reactions. Four practice problems are provided.

In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.

In this animated object, learners examine how changes in pH affect the salt bonds in strands of hair.

In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."

In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.

In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.

In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.

In this animated and interactive object, learners examine the properties of liquids, solids, and gases.

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

In this learning activity you'll discover how C#, attributes provide a way of associating data with an object in two forms - Fields and Properties.

In this animated activity, learners read about the properties of a square and its components. They then work practice problems to find the perimeter and area of squares.