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Chemistry

Free Chemistry study guide: 10 units with summaries, key ideas, flashcards and 164 practice questions with step-by-step solutions.

Lines up with: AP Chemistry; CLEP Chemistry; state end-of-course exams.

Units

1. UNIT 01

   Atomic structure and the periodic table

   Atoms are made of protons, neutrons and electrons. Their arrangement explains the periodic table and its trends.
2. UNIT 02

   Chemical bonding and compound structure

   Atoms bond to reach stable electron arrangements. The type of bond and the molecule's shape decide its properties.
3. UNIT 03

   Moles and stoichiometry

   The mole lets chemists count atoms by weighing them. Balanced equations give the ratios for how much product forms.
4. UNIT 04

   States of matter, gases and solutions

   Intermolecular forces decide whether a substance is a solid, liquid or gas. The gas laws relate pressure, volume, temperature and amount.
5. UNIT 05

   Chemical reactions

   Reactions rearrange atoms. Recognizing the type of reaction helps you predict products and write balanced equations.
6. UNIT 06

   Kinetics and equilibrium

   Kinetics is how fast a reaction goes; equilibrium is where it settles. Le Chatelier's principle predicts how equilibrium responds to stress.
7. UNIT 07

   Acids and bases

   Acids donate H⁺ and bases accept it. The pH scale measures how acidic a solution is.
8. UNIT 08

   Thermochemistry and electrochemistry

   Reactions absorb or release energy. Thermodynamics predicts whether a reaction happens on its own, and electrochemistry turns redox reactions into electricity.
9. UNIT 09

   Nuclear chemistry

   Unstable nuclei decay by emitting radiation, change into other elements, and release energy in fission and fusion.
10. UNIT 10

    Organic chemistry basics

    Organic compounds are carbon-based; their structure and functional groups determine their names, properties and reactions.