The periodic table is a central topic in AQA A-level Chemistry, examined across both AS and full A-level specifications. It covers atomic structure, electron configuration, periodicity, Group 1, Group 2, Group 7 (halogens), and Period 3 elements and their oxides. AQA assesses this content through written examinations sat at an approved centre, with no coursework component.
What does the periodic table topic cover in AQA A-level Chemistry?
The periodic table underpins a significant portion of the AQA A-level Chemistry specification (spec code 7405). Rather than being a single, isolated unit, periodic table content threads through multiple topic areas across Year 1 (AS content) and Year 2 (A2 content).
Year 1 / AS-level periodic table content
At AS level, AQA introduces the periodic table through the following areas:
- Atomic structure and the periodic table - sub-atomic particles, mass number, atomic number, isotopes, and the arrangement of electrons in shells and sub-shells (s, p, d orbitals)
- Electron configuration - how electrons fill orbitals in order of increasing energy; writing full and abbreviated configurations (e.g. [Ar] 3d6 4s2)
- Ionisation energies - first and successive ionisation energies as evidence for shell structure and sub-shell structure; trends across periods and down groups
- Periodicity - trends in atomic radius, ionic radius, melting point, and electrical conductivity across Period 3 (sodium to argon)
- Group 2 (alkaline earth metals) - reactions with water and dilute acids; trends in reactivity; uses of Group 2 compounds (e.g. calcium carbonate, magnesium hydroxide)
- Group 7 / the halogens - physical properties; oxidising power and displacement reactions; reactions of halide ions with silver nitrate; disproportionation of chlorine; uses of chlorine in water treatment
Year 2 / A2-level periodic table content
The full A-level builds on Year 1 content with greater depth:
- Period 3 oxides - structure and bonding of sodium oxide, magnesium oxide, aluminium oxide, silicon dioxide, phosphorus(V) oxide, and sulfur dioxide/trioxide; acid-base character of their reactions with water
- Period 3 chlorides - bonding, structure, and hydrolysis reactions of sodium chloride, magnesium chloride, aluminium chloride, silicon tetrachloride, and phosphorus(V) chloride
- Transition metals (d-block elements) - electron configurations of Sc-Zn; variable oxidation states; complex ion formation; ligand substitution; coloured ions; catalytic behaviour; reactions of aqueous ions with hydroxide, ammonia, and carbonate ions
- Reactions of ions in aqueous solution - qualitative analysis using precipitation and colour changes
Examiner tip: AQA frequently tests students' ability to explain trends using underlying theory (e.g. nuclear charge, shielding, atomic radius) rather than simply recall them. Practise writing explanations in full sentences.
How is the periodic table assessed in AQA A-level Chemistry?
AQA A-level Chemistry has no coursework component. All marks come from written examinations sat at an approved examination centre. Periodic table content appears across all three papers.
| Paper | Title | Duration | Marks | Periodic table relevance |
|---|---|---|---|---|
| Paper 1 | Inorganic and Physical Chemistry | 2 hours | 105 marks | High - Groups, Period 3, transition metals, periodicity |
| Paper 2 | Organic and Physical Chemistry | 2 hours | 105 marks | Moderate - atomic structure, electron config. |
| Paper 3 | Practical and Synoptic Chemistry | 2 hours | 90 marks | Synoptic - any topic including inorganic reactions |
Paper 1 is the most directly relevant paper for periodic table content. Questions range from multiple-choice and short-answer to extended-response questions worth up to 6 marks, where quality of written communication is assessed.
Practical skills related to inorganic chemistry (e.g. identifying halide ions, testing for transition metal ions) are assessed synoptically in Paper 3, even though there is no separate practical exam.
What are the entry requirements for AQA A-level Chemistry?
There are no nationally mandated entry requirements for A-level Chemistry set by AQA itself - individual schools, colleges, and online providers set their own. As a general guide:
- GCSE Chemistry (or Combined Science) at grade 5 or above is typically expected
- GCSE Maths at grade 5 or above is strongly recommended, as calculations feature throughout (moles, equilibrium constants, pH, rate equations)
- GCSE English at grade 4 or above is usually required for written examination performance
How long does it take to study AQA A-level Chemistry online?
A full AQA A-level Chemistry qualification is typically completed over 24 months when studied online with a provider such as learndirect, though some learners complete it in as little as 12-18 months depending on prior knowledge and study hours per week.
The recommended study commitment is approximately 10-12 hours per week to cover all content areas, including the substantial periodic table and inorganic chemistry sections, to examination standard.
What UCAS points does AQA A-level Chemistry carry?
AQA A-level Chemistry is graded A*-E (with U for ungraded). The UCAS tariff points are:
| Grade | UCAS Tariff Points |
|---|---|
| A* | 56 |
| A | 48 |
| B | 40 |
| C | 32 |
| D | 24 |
| E | 16 |
What can AQA A-level Chemistry lead to?
A-level Chemistry is a facilitating subject recognised by the Russell Group of universities. Strong performance can help you work towards:
- Undergraduate degrees in Chemistry, Biochemistry, Pharmacology, Medicine, Dentistry, Veterinary Science, Chemical Engineering, and Environmental Science
- Degree apprenticeships in pharmaceutical, chemical, and laboratory sectors
- Access to Higher Education pathways if combined with other qualifications
- Professional careers in research, healthcare, forensic science, materials science, and the chemical industry
Many competitive university courses - including Medicine and Dentistry - list A-level Chemistry as a required subject, not merely preferred.
Citable facts: AQA A-level Chemistry at a glance
| Detail | Information |
|---|---|
| Subject | Chemistry |
| Exam board | AQA |
| Qualification | A-level (Advanced Level) |
| Specification code | 7405 |
| Grading scale | A*-E (U = ungraded) |
| Assessment | 3 written papers; no coursework |
| Practical endorsement | Separate endorsement (Pass/Fail) - does not count towards grade |
| Typical online study duration | 12-18 months |
| Recommended weekly study hours | 10-12 hours |
| UCAS points (A*) | 56 |
| UCAS points (A) | 48 |
| Key periodic table papers | Paper 1 (primary); Paper 3 (synoptic) |
| Exam sat at | An approved AQA examination centre |
Key periodic table facts you need to know for AQA A-level Chemistry
What is periodicity and why does it matter?
Periodicity refers to the repeating trends in physical and chemical properties of elements as atomic number increases across a period. AQA requires students to explain these trends in terms of nuclear charge, electron shielding, and atomic/ionic radius - not simply describe them.
Key periodic trends tested by AQA include:
- Atomic radius decreases across a period (increasing nuclear charge pulls electrons closer); increases down a group (additional electron shells)
- First ionisation energy generally increases across a period (with dips at Group 3 and Group 6 explained by sub-shell and electron-pairing effects); decreases down a group
- Melting points across Period 3 reflect changes in structure and bonding: metallic bonding (Na-Al), giant covalent (Si), simple molecular (P4, S8, Cl2, Ar)
- Electronegativity increases across a period and decreases down a group (Pauling scale)
How do Group 2 elements behave?
Group 2 elements (Be, Mg, Ca, Sr, Ba) are the alkaline earth metals. AQA tests:
- Reactions with water: reactivity increases down the group (Mg reacts slowly with cold water; Ca, Sr, Ba react vigorously)
- Reactions with dilute acids: all react to form a salt and hydrogen
- Thermal decomposition of carbonates and nitrates: stability increases down the group
- Uses: Mg(OH)2 as an antacid; Ca(OH)2 in agriculture to neutralise acidic soils; BaSO4 as a barium meal in medical imaging; CaCO3 in the manufacture of iron
What do you need to know about the halogens (Group 7)?
AQA's halogen content focuses on:
- Oxidising power decreasing down the group: F2 > Cl2 > Br2 > I2
- Displacement reactions: a more reactive halogen displaces a less reactive halide ion from solution (e.g. Cl2 + 2KBr becomes 2KCl + Br2)
- Testing for halide ions with acidified silver nitrate: AgCl (white), AgBr (cream), AgI (yellow) precipitates; solubility in ammonia distinguishes them
- Disproportionation of chlorine in water and in cold dilute NaOH (used in water treatment)
- Reactions of chlorine with hot concentrated NaOH to form chlorate(V) ions
What do transition metals cover in AQA A-level Chemistry?
Transition metals (Sc-Zn, excluding Sc and Zn from the strict definition) are d-block elements with partially filled d sub-shells in at least one oxidation state. AQA covers:
- Writing electron configurations including exceptions (Cr: [Ar] 3d5 4s1; Cu: [Ar] 3d10 4s1)
- Variable oxidation states and their stability (e.g. Fe2+/Fe3+, Cu+/Cu2+, Mn2+/MnO4-)
- Complex ion formation: ligands, coordination number, shapes (octahedral, tetrahedral, square planar)
- Colour in transition metal ions: d-d electron transitions absorb visible light; colour observed is complementary colour
- Catalytic activity: Fe in the Haber process; V2O5 in the Contact process; MnO2 as a catalyst for H2O2 decomposition
- Reactions of Cu2+, Fe2+, Fe3+, Co2+, Mn2+, Cr3+ ions with NaOH(aq), NH3(aq), and Na2CO3(aq)
Frequently asked questions
Is the periodic table a separate unit in AQA A-level Chemistry?
No. AQA A-level Chemistry does not have a standalone "periodic table" unit. Periodic table content is integrated across the specification - primarily within the Inorganic Chemistry sections of Year 1 and Year 2 - and is assessed mainly in Paper 1 (Inorganic and Physical Chemistry). Transition metal chemistry, Group 2, Group 7, and periodicity all form part of the inorganic strand.
Which AQA A-level Chemistry paper tests periodic table content most heavily?
Paper 1 (Inorganic and Physical Chemistry) carries the most periodic table content. It is a 2-hour paper worth 105 marks and covers atomic structure, periodicity, Group 2, Group 7, and transition metals. Paper 3 also tests inorganic content synoptically alongside practical skills.
Do I need to memorise the entire periodic table for AQA A-level?
No - AQA provides a Data Sheet in the examination that includes a periodic table, standard electrode potentials, and other reference data. However, you are expected to know the positions and properties of key groups and periods well enough to apply and explain them without having to look up basic facts during the exam.
What is the difference between periodicity and a group trend?
Periodicity refers to repeating trends across periods (horizontal rows) as atomic number increases - for example, the pattern of first ionisation energies across Period 2 or Period 3. A group trend refers to how a property changes down a group (vertical column) - for example, increasing reactivity of Group 1 metals or decreasing oxidising power of halogens down Group 7.
How are transition metals different from other d-block elements in AQA?
AQA defines a transition metal as a d-block element that forms at least one stable ion with a partially filled d sub-shell. This means scandium (Sc) and zinc (Zn) are d-block elements but are not classified as transition metals under the AQA definition: Sc only forms Sc3+ (empty d sub-shell) and Zn only forms Zn2+ (full d sub-shell). This distinction is a common exam question.
Can I study AQA A-level Chemistry online and sit the exams?
Yes. learndirect offers online A-level Chemistry study with all teaching and learning delivered remotely. Examinations are sat at an approved AQA examination centre - learndirect can advise on how to arrange this. The exams themselves are the same papers sat by all AQA Chemistry candidates nationally.
What grade do I need in A-level Chemistry to study Medicine?
Most UK medical schools require A-level Chemistry at grade A or above, typically as part of an offer of AAA or A*AA. Requirements vary by university and are set by individual institutions, not by AQA. Always check the specific entry requirements of each medical school you are applying to via UCAS. Studying A-level Chemistry online with learndirect can help you work towards the grades needed, but no specific grade or university place can be guaranteed.
How does AQA A-level Chemistry compare to other exam boards?
AQA, Edexcel (Pearson), and OCR all offer A-level Chemistry with broadly similar content - atomic structure, periodicity, organic chemistry, and physical chemistry - because all specifications must meet Ofqual's Subject Level Conditions. Differences lie in how content is sequenced, how papers are structured, and the style of questions. learndirect delivers A-level Chemistry through AQA, Edexcel and OCR.
How many marks are available for extended-response questions in AQA Chemistry?
AQA A-level Chemistry papers include extended-response questions (typically 4-6 marks) that assess the quality of written communication as well as chemistry knowledge. These questions often ask students to explain trends, evaluate evidence, or describe a series of reactions - periodic table topics such as transition metal reactions and Period 3 oxides are common subjects for these questions.
Start your AQA A-level Chemistry journey with learndirect
Whether you are resitting A-level Chemistry, studying for the first time as an adult learner, or preparing for a university application that requires a science A-level, learndirect's online A-level Chemistry course gives you the flexibility to study at your own pace - without attending a physical classroom.
- Study entirely online, on your schedule
- Tutor support included throughout your course
- Covers the full AQA A-level Chemistry specification, including all periodic table and inorganic chemistry content
- Guidance on arranging your examinations at an approved centre
- learndirect holds a 4.5-star Trustpilot rating across its full range of courses
Explore the full range of learndirect A-level courses at learndirect.com/category/alevel-courses/.
