Atomic, Molecular and Formula Mass Explains the concept of atomic weight, what the unit is for atomic mass, discusses Avogadro's hypothesis, relative masses of gases, isotopes, calculating formula masses, moles, molar mass, and provides a follow-up quiz About Temperature Covers what temperature is, how the temperature scales were developed, heat and thermodynamics, the kinetic theory, thermal radiation, 3 K - the temperature of the universe. Basic Math Concepts Math concepts covered are scientific notation, significant digits, algebraic method, the metric system, graphing, using logs and antilogs. *Elements One of the best websites for a great review of introductory material. Here you'll find topics covering elements, compounds, mixtures, atoms, atomic theory, the elements, reactions of elements. A summary, questions, and tutorials are provided. *Introduction One of the best websites for a great review of introductory material. Here you'll find topics covering what is matter, properties of matter, conservation of matter, conservation of energy, overview, review questions, and tutorials. *Matter & Measurement An extensive set of notes that provide a good overview of the first few weeks in chemistry. Basic math skills are reviewed, and both examples and worksheets are provided. *Measurement One of the best websites for a great review of measurements. Here you'll find topics covering systems, recording, conversion factors density, energy measurements, review questions, and tutorials. Metric System ChemTeam developed this tutorial which covers metric units, prefixes, and converting between metric units. *Numbers & Math Operations A thorough review of the basic math skills required in chemistry. Significant Digits An excellent job of explaining the need for significant digits, how many is too many, and the rules to be followed when carrying out mathematical operations with significant digits. *Significant Figures This is an excellent site that includes every aspect of significant figures that is covered in chemistry: scientific notation, measuring underlies significant figures, significant figure rules, significant figure fable, rules for rounding off, metric system, math with significant figures, math with scientific notation. Examples followed by detailed explanations are provided. Significant Figures What are they, how are they used, and how to work with them in mathematical operations. Using Significant Figures What are they, how are they used, and how to work with them in mathematical operations. Ten Symptoms of a Chemical Change A very simple, succinct explanation of the ten signs to look for in identifying a chemical change.