Dr. Miriam Douglass
Dr. Martin McClinton
Learners examine a table of common polyatomic ions. Eight examples are provided for practice.
Measuring Volume Using a Graduated Cylinder
By Jill Crowder
Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.
Shapes of Simple Molecules - Part 1
By Dr. Miriam Douglass, Dr. Martin McClinton
In this animated and interactive object, learners observe how two, three, or four groups of electrons around the central atom cause the shape of the molecule to be linear, trigonal planar, bent, tetrahedral, or pyramidal. Seven examples and eight interactive questions are provided.
By Eileen Bouchard
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.
By Jill Larson
In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.
Creative Commons Attribution-NonCommercial 4.0 International License.
Learn more about the license »