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Learn Chemistry

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Learn chemistry! Get chemistry help, tutorials, example problems, self-quizzes, and chemistry tools so you can learn the concepts of general chemistry.

Introduction to Chemistry
Learn about what chemistry is and how the science of chemistry is studied.
What Is Chemistry?
What Is the Scientific Method?

Math Basics
Math is used in all the sciences, including chemistry. To learn chemistry, 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 Review
Significant Figures
Scientific Notation
Physical Constants
Metric Base Units
Table of Derived Metric Units
Metric Unit Prefixes
Unit Cancelling
Temperature Conversions
Experimental Error Calculations

Atoms and Molecules
Atoms are the basic building blocks of matter. Atoms join together to form compounds and molecules. Learn about the parts of the atom and how atoms form bonds with other atoms.
Basic Model of the Atom
Bohr Model
Atomic Mass & Atomic Mass Number
Types of Chemical Bonds
Ionic vs Covalent Bonds
Rules for Assigning Oxidation Numbers
Lewis Structures and Electron Dot Models
Introduction to Molecular Geometry
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. Learn about how matter reacts in predictable ways so that you can balance chemical equations.
Types of Chemical Reactions
How to Balance Equations
How to 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
Phase Diagrams

Chemical Reactions
Once you have learned about atoms and molecules, you're ready to examine the type of chemical reactions that can occur.
Reactions in Water
Types of Inorganic Chemical Reactions

Periodic Trends
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 the nature of the elements.
Periodic Properties & Trends
Element Groups

It's important to understand how mixtures behave.
Solutions, Suspensions, Colloids, Dispersions
Calculating Concentration

Gases exhibit special properties based on having no fixed size or shape.
Introduction to Ideal Gases
Ideal Gas Law
Boyle's Law
Charles' Law
Dalton's Law of Partial Pressures

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
Calculating pH
Salt Formation
Henderson-Hasselbalch Equation
Titration Basics
Titration Curves

Thermochemistry & Physical Chemistry
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?

Matter is always in motion! Learn about the motion of atoms and molecules, or kinetics.
Factors that Affect Reaction Rate
Chemical Reaction Order

Atomic & Electronic Structure
Much of the chemistry 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
Aufbau Principle & Electronic Structure
Nernst Equation
Quantum Numbers & Electron Orbitals
How Magnets Work

Nuclear Chemistry
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
Carbon-14 Dating

Chemistry Practice Problems

Index of Worked Chemistry ProblemsPrintable Chemistry Worksheets

Chemistry Quizzes

How to Take a TestAtom Basics QuizAtomic Structure QuizAcids & Bases QuizChemical Bonds QuizChanges in State QuizCompound Naming QuizElement Number QuizElement Picture QuizUnits of Measurement Quiz

General Chemistry Tools

Periodic TableChemistry GlossaryChemical Structures

- Find the structures for molecules, compounds, and functional groups.


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