Learners examine how the boiling point increases with increasing pressure. An example from industry is given.

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

Learners examine how chemists use moles to "count" atoms by weight. Examples are given.

Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

Students read about the basic organization and structure of the periodic table of elements. By clicking on the symbol, they can read that element's atomic number and weight. In an exercise, students identify elements as belonging to a group, a period, or neither.

Students read an introduction to the lab equipment used to contain and dispense chemicals. A quiz completes the activity.

In this highly interactive object, learners examine the internal elements of a 555 IC and their operation. Learners then test their knowledge in a variety of exercises.

Learners examine the elements of a data file memory of an Allen-Bradley SLC-500 programmable controller. A quiz completes the activity.

Get points for your knowledge on covalent bonding and covalent substances.

Review of Lab Safety

Match the element group with its properties.

Matching Elements of the Gerundive