Math is used in all the sciences, including high school chem class. To learn chem, you need to understand algebra, geometry, and some trig, as well as be able to work in scientific notation and perform unit conversions.
Accuracy & Precision
Metric Base Units
Derived Metric Units
How to Cancel Units
Calculate Experimental Error
Atoms and Molecules
Atoms are the basic building blocks of matter. Atoms join together to form compounds and molecules.
Atomic Mass & Atomic Mass Number
Types of Chemical Bonds
Ionic and Covalent Bonds
Lewis Structures and Electron Dot Models
What Is a Mole?
More About Molecules & Moles
Law of Multiple Proportions
Stoichiometry describes the proportions between atoms in molecules and reactants/products in chemical reactions. You can use this information to balance chemical equations.
Types of Chemical Reactions
Balance Redox Reactions
Gram to Mole Conversions
Limiting Reactant & Theoretical Yield
Mole Relations in Balanced Equations
Mass Relations in Balanced Equations
States of Matter
The states of matter are defined by the structure of matter as well as whether it has a fixed shape and volume. Learn about the different states and how matter transforms itself from one state to another.
States of Matter
The properties of the elements exhibit trends based on the structure of their electrons. The trends or periodicity can be used to make predictions about elements.
Periodic Properties & Trends
Acids & Bases
Acids and bases are concerned with the actions of hydrogen ions or protons in aqueous solutions.
Acid & Base Definitions
Common Acids & Bases
Strength of Acids & Bases
Thermochemistry & Physical Chem
Learn about the relationships between matter and energy.
Laws of Thermochemistry
Standard State Conditions
Calorimetry, Heat Flow and Enthalphy
Bond Energy & Enthalpy Change
Endothermic & Exothermic Reactions
What Is Absolute Zero?
Atomic & Electronic Structure
Much of the chem that you learn is associated with electronic structure, since electrons can move around much more easily than protons or neutrons.
Valences of the Elements
Aufbau Principle & Electronic Structure
Electron Configuration of the Elements
Quantum Numbers & Electron Orbitals
How Magnets Work
Nuclear chemistry is concerned with the behavior of protons and neutrons in the atomic nucleus.
Radiation & Radioactivity
Isotopes & Nuclear Symbols
Rate of Radioactive Decay
Atomic Mass & Atomic Abundance
Chem Practice ProblemsIndex of Worked Chem Problems
Printable Chem Worksheets
Chem QuizzesHow to Take a Chem Test
Atom Basics Quiz
Atomic Structure Quiz
Acids & Bases Quiz
Chemical Bonds Quiz
Changes in State Quiz
Compound Naming Quiz
Element Number Quiz
Element Picture Quiz
Units of Measurement Quiz
General Chem ToolsPeriodic Table - Use the periodic table to make predictions about element properties. Click on any element symbol to get facts about the element.
Chem Glossary - Look up the definitions of unfamiliar chem terms.
Chemical Structures - Find the structures for molecules, compounds, and functional groups.