Virginia · VDOESyllabus
Chemistry syllabus, dot point by dot point
Every dot point in the Virginia Chemistrysyllabus, with a focused answer for each one. Click any dot point for a worked explainer, past exam questions, and links to related dot points. Written by Claude Opus 4.8, Anthropic's latest AI.
Chemical Bonding and Nomenclature
Module overview →- How do you draw a molecule's electron-dot structure and predict its shape?Lewis structures and molecular geometry: draw electron-dot (Lewis) structures for simple molecules and use VSEPR to predict molecular shapes.9 min answer →
- How do you turn a chemical name into a formula and a formula into a name?Naming compounds and writing formulas: name and write formulas for ionic compounds (including polyatomic ions), binary molecular compounds and simple acids.10 min answer →
- Why are some molecules polar, and how do the forces between molecules set boiling points?Polarity and intermolecular forces: determine molecular polarity from shape and bond polarity, and compare dispersion, dipole-dipole and hydrogen-bonding forces and their effect on properties.9 min answer →
- Why do atoms bond, and what decides whether a bond is ionic, covalent or metallic?Types of chemical bonds: explain ionic, covalent and metallic bonding in terms of valence electrons and electronegativity, and predict bond type from the periodic table.9 min answer →
Molar Relationships and Chemical Reactions
Module overview →- Why must a chemical equation be balanced, and how do you balance one?Balancing equations and conservation of mass: balance chemical equations by adjusting coefficients to satisfy the law of conservation of mass.9 min answer →
- Which reactant runs out first, and how much product do you really get?Limiting reactants and percent yield: identify the limiting and excess reactants, calculate the theoretical yield, and calculate the percent yield.9 min answer →
- How do you find what fraction of a compound is each element, and its simplest formula?Percent composition and empirical formulas: calculate the percent composition by mass of a compound and determine its empirical and molecular formulas from composition data.9 min answer →
- How does a balanced equation let you calculate the amount of product from the amount of reactant?Stoichiometry and the mole ratio: use the mole ratio from a balanced equation to convert between moles and masses of reactants and products, including gas volumes at STP.10 min answer →
- How does the mole connect the mass of a sample to the number of particles it contains?The mole and molar mass: use the mole, molar mass and Avogadro's number to convert between mass, moles and number of particles.9 min answer →
- How do you recognize and predict the products of the five reaction types?Types of chemical reactions: classify reactions as synthesis, decomposition, single replacement, double replacement or combustion, and predict their products.9 min answer →
Phases of Matter and Gas Laws
Module overview →- Why does temperature stay constant while ice melts, and what does a heating curve show?Phase changes and heating curves: name the phase changes and their energy changes, and interpret a heating or cooling curve including the plateaus.9 min answer →
- How does kinetic molecular theory explain the behavior of solids, liquids and gases?States of matter and kinetic molecular theory: describe solids, liquids and gases in terms of particle arrangement and motion, and state the assumptions of kinetic molecular theory.9 min answer →
- How are the pressure, volume and temperature of a gas related?The gas laws: use Boyle's law, Charles's law, Gay-Lussac's law and the combined gas law to relate the pressure, volume and temperature of a gas.10 min answer →
- How do you bring the amount of gas into the picture with the ideal gas law?The ideal gas law and molar volume: use the ideal gas law to relate pressure, volume, temperature and moles, and use the molar volume of a gas at STP.9 min answer →
Reaction Energy and Rates
Module overview →- What is dynamic equilibrium, and how does a system respond to a stress?Chemical equilibrium and Le Chatelier's principle: describe dynamic equilibrium in a reversible reaction and predict the shift when concentration, temperature or pressure changes.10 min answer →
- How do you tell whether a reaction absorbs or releases energy?Endothermic and exothermic reactions: distinguish endothermic and exothermic processes by the direction of energy flow and the sign of the enthalpy change.9 min answer →
- What can a chemist change to make a reaction go faster or slower?Factors affecting reaction rate: describe how concentration, temperature, surface area, a catalyst and the nature of the reactants change the rate of a reaction.9 min answer →
- What does a potential energy diagram show, and what is activation energy?Potential energy diagrams and activation energy: interpret a potential energy diagram, identify the activation energy and the energy change, and explain the effect of a catalyst.9 min answer →
- Why do reactions happen at all, and what does collision theory require?Reaction rates and collision theory: explain reaction rate using collision theory, including effective collisions, orientation and the activation energy.9 min answer →
Scientific Investigation and Atomic Structure
Module overview →- How are electrons arranged in an atom, and why do valence electrons control chemistry?Electron configuration and energy levels: describe how electrons occupy energy levels, write electron configurations, identify valence electrons, and relate ground and excited states to spectra.9 min answer →
- Why is the atomic mass on the periodic table almost never a whole number?Isotopes and average atomic mass: define isotopes, write nuclide notation, and calculate the weighted average atomic mass of an element from its isotopes.9 min answer →
- How do significant figures and unit conversions keep a chemistry calculation honest?Measurement, significant figures and dimensional analysis: use SI units, significant figures and scientific notation, convert units by dimensional analysis, and calculate density and percent error.10 min answer →
- How do unstable nuclei decay, and how is the time for decay measured?Nuclear chemistry and radioactivity: describe alpha, beta and gamma decay, balance nuclear equations, distinguish fission from fusion, and use half-life.9 min answer →
- How does a chemist design a fair investigation and judge whether data are trustworthy?Scientific investigation and experimental design: plan and conduct safe investigations, identify independent, dependent and controlled variables, and distinguish hypothesis, theory and law.9 min answer →
- What is inside an atom, and how do protons, neutrons and electrons define an element?Structure of the atom: describe protons, neutrons and electrons, atomic number and mass number, and the historical development of the atomic model from Dalton to the modern view.9 min answer →
- How is the periodic table organized, and how do atomic properties change across it?The periodic table and periodic trends: describe the organization of the periodic table and the trends in atomic radius, ionization energy, electronegativity and reactivity across periods and down groups.10 min answer →
Solutions, Acids and Bases
Module overview →- What makes a substance an acid or a base, and what does the pH scale measure?Acids, bases and the pH scale: describe the properties and definitions of acids and bases, the pH scale, and the relationship between pH and hydrogen ion concentration.9 min answer →
- How is the concentration of a solution measured and used in calculations?Molarity and solution stoichiometry: calculate molarity, prepare and dilute solutions, and use molarity in solution stoichiometry.9 min answer →
- What happens when an acid meets a base, and how does titration find an unknown concentration?Neutralization and titration: write neutralization reactions that form a salt and water, and use titration data to find an unknown concentration.9 min answer →
- What is a solution, and what controls how much solute dissolves?Solutions, solubility and concentration: describe solutes, solvents and the dissolving process, the factors that affect rate of dissolving and solubility, and how to read a solubility curve.9 min answer →