AP Chemistry Practice (Interactive)
AP — Chemistry Practice
10 auto-graded practice problems. Select an answer, submit, and review the explanation.
Intuition
Chemistry is the science of transformation: At its core, chemistry is about how atoms rearrange during reactions to form new substances. The periodic table is the map, it organises elements by their electron configurations, which determine how they bond and react. Understanding electron behaviour is the key to predicting what will happen in any chemical reaction.
Why it matters: Chemistry explains how drugs work, how batteries store energy, how plastics are made, and how food is digested. It’s the central science, connecting physics (energy and forces), biology (molecular mechanisms), and engineering (materials design).
The key insight: Electronegativity is the most important concept in chemistry. It determines how electrons are shared in bonds, which determines molecular shape, which determines properties like boiling point, solubility, and reactivity. If you understand electronegativity trends, you can predict most chemical behaviour.
Atomic Structure and Periodicity
Intuition: Chemistry is about how atoms bond and react. The periodic table organises elements by their electron configurations, which determine their chemical behaviour, similar valence electrons mean similar reactivity.
Common Mistakes: Confusing ionization energy trends with atomic radius trends; mixing up formal charge and oxidation state; forgetting the inert pair effect for heavier elements.
Bonding and Intermolecular Forces
Stoichiometry
Thermodynamics
Kinetics and Equilibrium
Cross-References
- Atomic Structure: Electron configurations and periodic trends.
- Bonding: Lewis structures and intermolecular forces.
- Thermodynamics: Enthalpy, Hess’s law, and thermochemical calculations.