eSchool Today
E School Today: Elements, Compounds, Substances and Mixtures
Learn about the classification of matter based on whether the chemical composition is pure or a mixture. Understand the definitions of elements, compounds, substances, and mixtures, and what the differences are between them. Five types...
PBS
Pbs Learning Media: Chemical Bonds
This interactive activity developed for Teachers' Domain demonstrates how attractive forces between atoms create chemical bonds, resulting in the formation of molecules and compounds.
Chem Tutor
Chem Tutor: Binary Covalent Compounds
An explanation of bonding in binary covalent compounds. Rules for naming binary covalent compounds using common names and system names are also provided.
Crescent Public Schools
The Internet Science Room: Chemical Formulas
This illustrated tutorial serves as a foundation for understanding chemical formulas in chemistry.
Chem Tutor
Chem Tutor: Chemistry: Compounds
This lesson focuses on chemical compounds including Ionic and Covalent Bonds, Valences, Lewis Structures, Binary Covalent Compounds, Radicals or Polyatomic Ions, and much more. It also includes a compound worksheet in which the learners...
Simon Fraser University
Chem1 Virtual Textbook: Naming Chemical Substances
As part of the "Basic Atomics" section of the Virtual Textbook, this site examines basic chemical nomenclature and covers a variety of subjects related to chemical substances. Other topic covered include naming the elements, binary...
Science Struck
Science Struck: Chemical Change Examples That We See Around Us
Explains what a chemical change is and how to identify one. Provides examples of chemical changes that are often seen in organic and inorganic compounds.
Khan Academy
Khan Academy: Test Prep: Mcat: Chemical Processes: Stereochemistry: Chiral Drugs
Explains the concept of chirality and how it is applied in the development of pharmaceuticals.
CK-12 Foundation
Ck 12: Hydrocarbon Rings
[Free Registration/Login may be required to access all resource tools.] In this module, students will explore cyclic hydrocarbons, and explain how ring strain contributes to the shape of cyclic hydrocarbons. They will also name and write...
CK-12 Foundation
Ck 12: Life Science: 2.1 Elements and Compounds
Learn how basic elements form molecules to support life.
Science Struck
Science Struck: What Is Solvent Extraction and Why Is It Important?
Discusses the importance of solvent extraction, provides examples, looks at the importance of appropriate solvent selection, describes the conditions needed for extraction, and explains some of the methods used.
Science Buddies
Science Buddies: Measuring the Amount of Acid in Vinegar by Titration
There are many different types of vinegar that you can buy to use around the kitchen for cooking and pickling. The chemical compound that gives vinegar its tart taste and pungent smell is acetic acid. In this experiment you will work to...
University Corporation for Atmospheric Research
Ucar: Hydrocarbons
Learn about "hydrocarbons", chemical compounds whose molecules are made up entirely of carbon and hydrogen atoms.
Other
Science Alive: Synthetic vs. Natural: What's the Difference?
Explains the difference between a synthetic compound and one found in its natural state. Uses the example of Percy Julian and Josef Pikl making the compound physostigmine, a medicine that was used in the treatment of glaucoma, in their lab.
Towson University
Towson University: Drawing Lewis Structures
Brief rules for writing Lewis structures for simple compounds. Some examples are included.
Chem Tutor
Chem Tutor: Chemistry: Lewis Structures of the Elements
This colorful page goes over the proper techniques for writing Lewis structures for elements. This is a great place to begin learning how to write Lewis structures. When you are ready for a more advanced lesson, follow the link to learn...
Science Buddies
Science Buddies: Solubility Science: How Much Is Too Much?
In this science activity, you will find out how much of a compound is too much to dissolve.
Science Bob Pflugfelder
Science Bob: Homemade Slime!
Contains a procedure for creating slime -- a polymer formed by mixing water, borax, Elmer's glue, and food coloring. Following the procedure, the site contains a brief description of what polymers are.
Utah Education Network
Uen: Reactions!
Students use colored marshmallows (representing atoms) to construct compounds and arrange them into a balanced chemical equation.
Science Struck
Science Struck: Composition of Air
Discover all the elements and chemical compounds that are found in the air. They are presented in a chart listing their symbols, molecular weights, and what percent of the atmosphere they each comprise. A set of facts is also provided.
Science Struck
Science Struck: 4 Uses of Potassium Chlorate
Potassium chlorate acts as a catalyst to produce oxygen. Read about some of its uses, including in fireworks and as a water disinfectant.
Science Buddies
Science Buddies: Do Milkweed Bugs Show a Color Preference for Egg Laying Sites?
Milkweed bugs, as their name suggests, have a close relationship with the milkweed plant. The plant produces a milky sap, and toxic compounds, but somehow the milkweed bug is unaffected by them. Instead, it concentrates chemicals from...
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