Singapore · MOE Syllabus Outcomes
Secondary 3 Chemistry
This course explores the fundamental principles governing the composition and behavior of matter. Students investigate how atomic structure influences chemical bonding and reactions while developing mastery in quantitative calculations and chemical thermodynamics.
01Atomic Structure and the Particle Model
Students explore the subatomic world to understand how the arrangement of protons, neutrons, and electrons defines an element's identity and properties.
An investigation into the kinetic particle theory and how energy changes affect the physical state of substances.
Exploring the energy changes involved during melting, boiling, condensation, and freezing, and interpreting heating/cooling curves.
Investigating the movement of particles in gases and liquids, and the factors affecting diffusion rates.
Examining the evolution of the atomic model from Dalton to Rutherford, highlighting key experiments and discoveries.
Understanding the properties of protons, neutrons, and electrons, and how they define an element's identity.
Exploring isotopes, their abundance, and how they contribute to the calculation of relative atomic mass.
Understanding the arrangement of electrons in discrete shells around the nucleus and how this relates to stability.
Investigating the role of valence electrons in determining an element's chemical properties and reactivity.
Understanding how atoms gain or lose electrons to form ions and achieve stable electronic configurations.
02Chemical Bonding and Structure
This unit examines how atoms interact to form stable structures and how these microscopic bonds manifest as macroscopic properties.
An overview of the different types of chemical bonds and the driving forces behind their formation.
Analyzing the electrostatic attraction between oppositely charged ions formed by electron transfer.
Investigating the giant ionic lattice structure and its influence on the physical properties of ionic compounds.
Understanding how atoms achieve stability by sharing electrons to form covalent bonds.
Distinguishing the properties of simple molecular substances based on weak intermolecular forces.
Examining the unique structures and properties of giant covalent networks like diamond and graphite.
Exploring the 'sea of delocalized electrons' model and its impact on the physical characteristics of metals.
Investigating the characteristic properties of metals and how alloying can modify these properties.
03Stoichiometry and the Mole Concept
A quantitative look at chemistry focusing on the mole concept, empirical formulas, and reaction yields.
Introducing the concepts of relative atomic mass, relative molecular mass, and Avogadro's constant.
Bridging the gap between the microscopic number of atoms and macroscopic measurable mass using the mole concept.
Determining the percentage of each element in a compound from its chemical formula.
Determining the simplest whole-number ratio of atoms in a compound from experimental data.
Calculating the actual number of atoms of each element in a molecule using empirical formula and molecular mass.
Applying the law of conservation of mass to balance chemical equations.
Using balanced equations and mole ratios to calculate reacting masses of substances.
Applying the concept of molar volume to calculate reacting volumes of gases at standard conditions.
04Chemical Energetics and Thermodynamics
Students investigate energy changes during reactions and the fundamental laws governing heat transfer.
Classifying reactions as exothermic or endothermic based on energy exchange with the surroundings.
Representing the energy changes during a reaction using energy profile diagrams, including activation energy.
Understanding that energy is absorbed to break bonds and released when bonds are formed.
Introducing collision theory and how it explains the factors affecting reaction rates.
Investigating how concentration, surface area, temperature, and pressure influence reaction rates.
Exploring the role of catalysts in lowering activation energy and increasing reaction rates without being consumed.
05Patterns in the Periodic Table
Analyzing trends across periods and down groups to predict the behavior of elements.
Understanding the arrangement of elements by atomic number, periods, and groups.
Identifying repeating patterns in reactivity, melting/boiling points, and density across periods and down groups.
Exploring trends in metallic and non-metallic character and their relationship to chemical properties.
Investigating the physical and chemical properties of Alkali Metals and their reactivity trends.
Comparing the physical and chemical properties of Halogens and their displacement reactions.
Examining the stability and inertness of Group 18 elements due to their full outer electron shells.
Investigating the unique characteristics of d-block elements, including variable oxidation states and catalytic activity.
06Chemical Reactions and Solutions
An exploration of acids, bases, salts, and the qualitative analysis of aqueous solutions.
Investigating the characteristic chemical properties of acids and bases.
Understanding the pH scale as a measure of acidity/alkalinity and the use of indicators.
Defining salts and exploring various methods of preparing soluble and insoluble salts.
Understanding the methods of preparing soluble salts through acid-base reactions, including titration.
Learning how to prepare insoluble salts using precipitation reactions and solubility rules.
Using chemical tests to identify common cations in aqueous solutions.
Using chemical tests to identify common anions and gases produced in reactions.
Applying a systematic approach to identify multiple unknown ions in a mixture.