Claim 1 · Structures and Properties of Matter 3 clusters
30–40% of exam
Use periodic patterns and particulate models to predict the structure, behavior, and bulk properties of matter — atoms, ions, molecules, gases, and solutions.
Claim 2 · Chemical Reactions 5 clusters
36–46% of exam
Plan and interpret investigations of reactions: predict products, balance equations, model rate and equilibrium shifts, and explain redox + acid–base behavior with evidence.
Claim 3 · Energy 1 cluster
10–14% of exam
Build and modify models that track energy flow in chemical and physical systems — PE diagrams, heating/cooling curves, calorimetry, electric/magnetic interactions of charged particles.
Claim 4 · Waves and Electromagnetic Radiation 2 clusters
5–7% of exam
Evaluate published claims about how EM radiation interacts with matter — absorption, emission spectra, and frequency-dependent effects.
Claim 5 · Matter and Energy in Organisms and Ecosystems 1 cluster
2–5% of exam
Apply conservation of matter + energy to biological systems (photosynthesis, respiration) using the same models you use for chemical reactions.
Claim 6 · Engineering, Technology, and Applications of Science 1 cluster
5–11% of exam
Evaluate real-world chemistry-driven designs against criteria and constraints — trade-offs in batteries, materials, fuels, environmental solutions.
Investigations track 2 clusters
~15% of written exam
Clusters anchored on the required hands-on labs.