Singapore N(A)-Level Chemistry (5107): complete 2026 study guide
A complete 2026 guide to Singapore GCE Normal (Academic) Chemistry, the Chemistry half of Science 5107. The three syllabus sections, the Paper 3 and Paper 4 structure, the Periodic Table you are given, study strategy, and a link to every dot-point answer page.
Singapore GCE Normal (Academic) Chemistry is the Chemistry half of the Science subject 5107 (Chemistry and Biology). It introduces the big ideas of chemistry, the particle model, atoms and bonding, the mole, acids and salts, the reactivity of metals, energy and rate, redox and electrolysis, and a first look at organic chemistry, all at a pace and depth pitched for the Normal (Academic) course.
This page is the index. Below you will find the three-section content breakdown, the structure of the Chemistry papers, what you are given in the exam, a study strategy, and a link to every dot-point answer page we have shipped for N(A) Chemistry in 2026.
The three sections of N(A) Chemistry
- Matter, Structures and Properties
- Experimental chemistry (measurement, apparatus, and the methods used to separate and purify mixtures), the particulate nature of matter (solids, liquids and gases, changes of state, and diffusion), and chemical bonding (atomic structure, ionic bonding, and covalent bonding).
- Chemical Reactions
- Chemical calculations using the mole (formulae, equations, relative masses, and reacting masses), acids, bases and salts (the pH scale, the reactions of acids, and the preparation of salts), the periodic table and the reactivity of metals, energy changes in reactions, the speed of reactions, oxidation and reduction, electrolysis, and the qualitative analysis tests used to identify ions and gases.
- Chemistry in a Sustainable World
- The periodic table as an organising tool, organic chemistry (fuels, alkanes and alkenes, and alcohols and carboxylic acids), and the everyday and environmental uses of chemistry, including metals and their extraction, alloys, and the products of electrolysis.
Exam structure
The Chemistry content of Science 5107 is examined in two papers, sat together in a single session of 1 hour 15 minutes.
- Paper 3: Chemistry multiple choice (20 marks, advised time about 30 minutes). Twenty compulsory multiple choice questions across all the Chemistry sections. A Periodic Table is printed in this paper.
- Paper 4: Chemistry structured (30 marks, advised time about 45 minutes). Section A has compulsory structured questions worth 22 marks, with the last question worth 8 marks. Section B has two structured questions worth 8 marks, of which you answer one.
There is no separate practical paper. Practical skills are tested inside the structured questions, where you may be asked to choose apparatus, read a scale, describe an observation, or plan a simple method.
What you are given
A Periodic Table is provided in the multiple choice paper, so relative atomic masses and proton numbers are available to you. An approved scientific calculator is allowed. You are expected to recall, without being told, the charges on common ions, the formulae of common compounds, the reactivity series of metals, the colours of common precipitates, and the tests for common gases and ions. Build a one-page memory sheet for these.
Our 2026 N(A) Chemistry syllabus answers
For section-by-section coverage, every learning outcome we have shipped has its own focused answer page with worked exam-style questions and cross-links to related points.
Browse the full set at /sg-n-level/chemistry/syllabus.
Study strategy
N(A) Chemistry rewards steady, layered study rather than last-minute cramming. The recipe:
- Master the small set of calculations. Working out a formula, balancing an equation, and finding reacting masses with the mole follow predictable steps. Drill them on simple numbers until they are automatic.
- Learn the patterns, not endless facts. The reactions of acids, the trends in the periodic table, and the reactivity series are patterns. Once you see the pattern, you can predict an answer instead of memorising every case.
- Practise clear observations. Many marks come from describing what you would see, such as a colour change, a gas given off, or a precipitate forming. Write in full sentences with the right colour words.
- Build a memory sheet. Common ion charges, qualitative analysis tests, and organic reagents and conditions reward a single revision page you review often.
- Sit timed practice papers. From the start of Secondary 5, attempt full Paper 3 and Paper 4 sets under timed conditions so the 1 hour 15 minute session feels comfortable.
For the official syllabus
SEAB publishes the full 5107 Science (Chemistry, Biology) syllabus document and examination requirements at seab.gov.sg. Always confirm the content and the assessment weightings against the current syllabus year, as SEAB reviews syllabuses periodically.
Chemistry guides
In-depth written guides with paired practice quizzes.
- Acids, Bases and Salts (Singapore N(A)-Level Science Chemistry 5107): acids as sources of hydrogen ions, the pH scale and indicators, the three reactions of acids, and choosing the right method to prepare a pure salt
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Acids, Bases and Salts. Acids as sources of hydrogen ions and bases that accept them, the pH scale and indicators, the three characteristic reactions of acids, and how to choose between the acid-plus-excess-solid method and precipitation to prepare a pure salt, with links to every dot point.
8 min readRead → - Atomic Structure and Bonding (Singapore N(A)-Level Science Chemistry 5107): the structure of the atom, electron shells, and how ionic and covalent bonding explain the properties of compounds
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Atomic Structure and Bonding. The protons, neutrons and electrons inside an atom, proton and nucleon number, electron shell arrangements, and how transferring electrons gives ionic bonding while sharing electrons gives covalent bonding, with each bonding type linked to the properties of its compounds.
6 min readRead → - Electrolysis (Singapore N(A)-Level Science Chemistry 5107): breaking down molten and aqueous compounds with electricity, predicting the products at each electrode, and the everyday uses of electrolysis
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Electrolysis. How molten ionic compounds and aqueous solutions are broken down by electricity, why the compound must be molten or dissolved, how to predict the product at each electrode, and the everyday uses including electroplating, with links to every dot point.
5 min readRead → - Energetics, Rates and Redox (Singapore N(A)-Level Science Chemistry 5107): exothermic and endothermic reactions, the factors that change the speed of a reaction, and oxidation and reduction in terms of oxygen and electrons
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Energetics, Rates and Redox. Exothermic and endothermic reactions and their energy level diagrams, how concentration, temperature, surface area and catalysts change reaction speed through colliding particles, and oxidation and reduction defined by oxygen and by electron transfer, with links to every dot point.
5 min readRead → - Experimental Chemistry and Separation (Singapore N(A)-Level Science Chemistry 5107): choosing and reading laboratory apparatus, separating mixtures by physical methods, and testing for purity and identifying common gases
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Experimental Chemistry and Separation. Choosing and correctly reading apparatus for volume, mass, temperature and time, the separation methods from filtration to fractional distillation and chromatography, and using melting and boiling points and gas tests to judge purity and identify substances, with links to every dot point.
5 min readRead → - Metals and Reactivity (Singapore N(A)-Level Science Chemistry 5107): the properties of metals and alloys, the reactivity series and displacement, and how reactivity decides the way a metal is extracted and how it corrodes
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Metals and Reactivity. The general physical properties of metals, why alloys are often harder and more useful than pure metals, the reactivity series and how it predicts displacement, and how a metal's reactivity decides its extraction method and its tendency to corrode, with links to every dot point.
5 min readRead → - Organic Chemistry (Singapore N(A)-Level Science Chemistry 5107): the alkanes as fuels, the alkenes and the bromine water test, and ethanol as an alcohol with its uses
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Organic Chemistry. The alkanes as saturated hydrocarbon fuels and their complete and incomplete combustion, the alkenes as unsaturated hydrocarbons distinguished by the bromine water test, and ethanol as a member of the alcohols made by fermentation, with links to every dot point.
5 min readRead → - Particulate Nature of Matter (Singapore N(A)-Level Science Chemistry 5107): the particle model of solids, liquids and gases, the changes of state and diffusion, and the difference between elements, compounds and mixtures
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of the Particulate Nature of Matter. The arrangement, movement and energy of particles in solids, liquids and gases, the changes of state and why temperature stays constant during them, diffusion explained by moving particles, and the difference between elements, compounds and mixtures, with links to every dot point.
5 min readRead → - Stoichiometry and the Mole (Singapore N(A)-Level Science Chemistry 5107): writing formulae and balancing equations, the mole and relative masses, and using mole ratios to work out reacting masses
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Stoichiometry and the Mole. Writing formulae from ion charges and balancing symbol equations, the meaning of the mole and relative masses, and using the mole ratio from a balanced equation to calculate reacting masses, concentration and percentage yield, with links to every dot point.
7 min readRead → - The Periodic Table (Singapore N(A)-Level Science Chemistry 5107): how the table is arranged into groups and periods, the trends down Group I, Group VII and Group 0, and the difference between metals, non-metals and the transition block
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of the Periodic Table. How the table is arranged into groups and periods and how position links to electron arrangement, the trends down the Group I metals, the Group VII non-metals and the Group 0 noble gases, and how metals, non-metals and the transition block differ, with links to every dot point.
5 min readRead →
Chemistry practice quizzes
Multiple-choice drills with worked answer explanations. Your scores stay on this device.
- Acids, Bases and Salts quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)15 questionsStart →
- Atomic Structure and Bonding quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)15 questionsStart →
- Electrolysis quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)15 questionsStart →
- Energetics, Rates and Redox quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)14 questionsStart →
- Experimental Chemistry and Separation quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)14 questionsStart →
- Metals and Reactivity quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)14 questionsStart →
- Organic Chemistry quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)14 questionsStart →
- Particulate Nature of Matter quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)14 questionsStart →
- Stoichiometry and the Mole quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)13 questionsStart →
- The Periodic Table quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107)14 questionsStart →
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