The periodic table is a cornerstone of AQA A-level Chemistry. Assessed across all three written papers, it underpins topics from atomic structure and bonding to transition metals and electrode potentials. Students study Groups 1, 2 and 7, Period 3 elements, and the d-block in depth, building the analytical skills universities and employers value most.
What does the AQA A-level Chemistry specification cover about the periodic table?
The periodic table is not a standalone topic in AQA A-level Chemistry - it is the organising framework through which the entire course is taught. The AQA specification (code 7405) divides periodic table content across two broad areas: Physical Chemistry and Inorganic Chemistry.
Physical Chemistry: atomic structure and periodicity
Before you can interpret trends across the periodic table, you need to understand what is happening inside atoms. AQA A-level Chemistry requires you to study:
- Atomic structure - subatomic particles, mass number, atomic number, isotopes, and the use of mass spectrometry to determine relative atomic mass
- Electron configuration - sub-shells (s, p, d, f), orbital diagrams, and how electronic structure explains the position of elements in the periodic table
- Ionisation energies - first and successive ionisation energies, and how they provide evidence for shells and sub-shells
- Periodicity - trends in atomic radius, ionic radius, melting point, and electrical conductivity across Period 3 (sodium to argon)
Inorganic Chemistry: groups and the d-block
The inorganic section of the specification covers specific groups and the transition metals in detail:
- Group 2 (alkaline earth metals) - reactions with water and dilute acids, thermal decomposition of carbonates and nitrates, solubility trends, and uses of Group 2 compounds (e.g. calcium hydroxide in agriculture, barium sulfate in medicine)
- Group 7 / Group 17 (halogens) - properties and trends, reactions of halogens as oxidising agents, halide ions as reducing agents, disproportionation of chlorine, uses of chlorine in water treatment
- Period 3 oxides and chlorides - reactions with water, acid-base character, and how these illustrate periodic trends
- Transition metals (d-block) - electronic configurations, variable oxidation states, formation of coloured ions, catalytic behaviour, and complex ion formation (including ligand substitution and the effect on colour)
Tip for learners: AQA examiners frequently ask you to explain trends rather than simply recall them. Practise writing explanations that link observations to underlying atomic or electronic structure.
How is the periodic table assessed in AQA A-level Chemistry?
AQA A-level Chemistry is assessed entirely through three written examinations sat at the end of the two-year course. There is no coursework, but practical skills are assessed through a Practical Endorsement (a separate pass/fail qualification recorded on your certificate).
| Paper | Title | Duration | Marks | Periodic Table Content |
|---|---|---|---|---|
| Paper 1 | Inorganic and Physical Chemistry | 2 hours | 105 marks | Atomic structure, periodicity, Groups 2 & 7, Period 3 |
| Paper 2 | Organic and Physical Chemistry | 2 hours | 105 marks | Some physical chemistry overlap (e.g. energetics, kinetics) |
| Paper 3 | Practical and Synoptic | 2 hours | 90 marks | Synoptic questions drawing on all topics including inorganic |
Assessment objectives (AOs):
- AO1 - Demonstrate knowledge and understanding of scientific ideas, processes, techniques and procedures
- AO2 - Apply knowledge and understanding of scientific ideas, processes, techniques and procedures
- AO3 - Analyse, interpret and evaluate scientific information, ideas and evidence
Periodic table questions most commonly target AO2 and AO3 - expect to interpret data, predict properties of unfamiliar elements, and evaluate experimental evidence.
What are the key periodic table trends students must know for AQA A-level Chemistry?
Understanding why trends occur is just as important as knowing what they are. Here are the core trends AQA examiners test:
Across a period (left to right)
| Property | Trend Across Period 3 | Reason |
|---|---|---|
| Atomic radius | Decreases | Increasing nuclear charge pulls electrons closer; same shell |
| First ionisation energy | Generally increases | Greater nuclear charge; electrons in same shell |
| Melting point | Increases then decreases sharply | Metallic to giant covalent (Si) to simple molecular |
| Electrical conductivity | High (metals) to low (non-metals) | Delocalised electrons in metals; none in non-metals |
| Oxide character | Basic to amphoteric (Al2O3) to acidic | Electronegativity increases across period |
Down a group
| Property | Trend Down Group 2 | Trend Down Group 7 |
|---|---|---|
| Atomic radius | Increases | Increases |
| First ionisation energy | Decreases | Decreases |
| Reactivity | Increases (metals lose electrons more easily) | Decreases (halogens gain electrons less easily) |
| Electronegativity | Decreases | Decreases |
Transition metal properties
The d-block elements (Sc-Zn in Period 4) have distinctive properties that set them apart from main group elements:
- Variable oxidation states - e.g. iron exists as Fe2+ and Fe3+; manganese ranges from +2 to +7
- Coloured compounds - arise from d-d electron transitions when ligands split d-orbital energy levels
- Catalytic activity - e.g. iron in the Haber process, vanadium(V) oxide in the Contact process
- Complex ion formation - transition metal ions act as Lewis acids, accepting lone pairs from ligands (e.g. [Cu(H2O)6]2+, [CuCl4]2-)
What practical skills relate to the periodic table in AQA A-level Chemistry?
AQA's Practical Endorsement requires students to demonstrate competency across a range of core practicals. Several directly involve periodic table chemistry:
- Qualitative analysis of ions - identifying halide ions using silver nitrate and ammonia; identifying transition metal ions by precipitate colour
- Reactions of Group 2 elements - observing and recording the reactions of magnesium and calcium with water
- Titrations and colorimetry - used in transition metal investigations (e.g. determining the formula of a complex ion)
- Preparation of inorganic compounds - e.g. preparation of a transition metal complex
Even if you are studying online, you will need to demonstrate practical skills. learndirect's A-level Chemistry practical-included course pairs your online study with the lab sessions required to meet the Practical Endorsement requirements.
What entry requirements do you need to study AQA A-level Chemistry?
There are no nationally mandated entry requirements for A-level Chemistry, but most providers, including learndirect, recommend:
- GCSE Chemistry (or GCSE Combined Science) at grade 6 or above (equivalent to the old grade B)
- GCSE Maths at grade 5 or above - essential for calculations involving moles, equilibrium constants, and electrode potentials
- GCSE English at grade 4 or above - needed for extended written answers and evaluative questions
If you do not hold formal GCSEs, learndirect's admissions team can advise on your options based on your prior learning and experience.
Quick-reference facts table: AQA A-level Chemistry at learndirect
| Detail | Information |
|---|---|
| Subject | Chemistry |
| Exam board | AQA |
| Specification code | 7405 |
| Typical study duration | Up to 24 months |
| How it's assessed | 3 written papers (2 hrs each) + Practical Endorsement (pass/fail) |
| Grading | A*-E (A-level); Practical Endorsement: Pass or Not Classified |
| Exams sat at | An approved external examination centre |
| Recommended entry | GCSE Chemistry/Combined Science grade 6+; GCSE Maths grade 5+ |
| UCAS points (A*) | 56 points |
| UCAS points (A) | 48 points |
| UCAS points (B) | 40 points |
| What's next | Degrees in Chemistry, Biochemistry, Medicine, Pharmacy, Chemical Engineering, Environmental Science, and more |
| Course fee | From £708.74 (exam included); £1,724.99 with the practical endorsement included |
UCAS tariff points are based on the standard UCAS tariff for A-level qualifications. Always verify current tariff values at ucas.com.
How does AQA A-level Chemistry compare with other exam boards?
learndirect delivers A-level Chemistry through AQA. For context, the other major awarding bodies in England are Edexcel (Pearson) and OCR, both of which also offer A-level Chemistry with broadly similar content, as all specifications must meet Ofqual's subject content requirements.
| Feature | AQA (7405) | Edexcel (9CH0) | OCR A (H432) |
|---|---|---|---|
| Number of written papers | 3 | 3 | 3 |
| Practical assessment | Endorsement (pass/fail) | Endorsement (pass/fail) | Endorsement (pass/fail) |
| Periodic table coverage | Groups 1, 2, 7; Period 3; d-block | Groups 1, 2, 17; Period 3; d-block | Groups 2, 17; Period 3; d-block |
| Synoptic paper | Paper 3 | Paper 3 | Paper 3 |
| Available through learndirect | Yes | No | No |
learndirect delivers A-level Chemistry through AQA only. Check with learndirect for the latest information on which boards are available for your chosen subject.
How can studying the periodic table help with university applications?
A-level Chemistry is a facilitating subject, one of the subjects most commonly required or preferred by universities for a wide range of degree courses. Strong performance in periodic table topics is particularly relevant for:
- Medicine and Dentistry - inorganic chemistry and biochemistry underpin pharmacology and physiology
- Pharmacy and Pharmacology - transition metal chemistry features in drug design and catalysis
- Chemical Engineering - industrial processes (Haber, Contact) are rooted in periodic table chemistry
- Materials Science - periodic trends explain the properties of metals, ceramics and semiconductors
- Environmental Science - Group 2 chemistry (e.g. calcium carbonate in water treatment) is directly applicable
Many Russell Group universities list A-level Chemistry as a required subject for Medicine, Veterinary Science, and Chemistry degrees. Always check individual university entry requirements on UCAS and institutional websites.
Frequently asked questions
Is the periodic table given to students in AQA A-level Chemistry exams?
Yes. AQA provides a Data Booklet in all three Chemistry papers, which includes the periodic table, standard electrode potentials, and other key data. However, you are still expected to understand and explain trends - the data booklet does not provide explanations, only values.
Which groups are most important for AQA A-level Chemistry?
Groups 2 and 7 (17) receive the most dedicated coverage in the AQA specification and appear regularly in exam questions. The d-block (transition metals) is also heavily examined, particularly in Paper 1. Group 1 (alkali metals) is covered at GCSE level and provides background context rather than new A-level content.
Do I need to memorise electron configurations for all elements?
You need to be able to write electron configurations for elements up to krypton (Z = 36) using sub-shell notation (e.g. 1s2 2s2 2p6 3s2 3p6 3d10 4s2). You should also know the anomalous configurations of chromium (3d5 4s1) and copper (3d10 4s1), which AQA examiners test specifically.
How many marks does periodic table content typically account for in AQA A-level Chemistry?
Inorganic Chemistry (which is largely periodic table content) accounts for approximately 20% of the total A-level marks according to the AQA specification. When you include the physical chemistry topics that underpin periodic trends (atomic structure, periodicity, bonding), the proportion is considerably higher.
Can I study AQA A-level Chemistry online?
Yes. learndirect offers AQA A-level Chemistry as a fully online course, allowing you to study at your own pace from home. Written examinations are sat at an approved external examination centre that you book in advance of your assessment window.
What is the difference between AS-level and A-level Chemistry?
AS-level Chemistry (AQA code 7404) is a standalone qualification covering roughly the first year of A-level content. It is graded A-E and does not count towards the A-level grade. A-level Chemistry (AQA code 7405) is the full two-year qualification graded A*-E. Most universities require the full A-level, not the AS, for entry to science degrees.
How long does it take to complete AQA A-level Chemistry with learndirect?
Most learners complete the course within 24 months, studying flexibly around work and family commitments. Motivated learners studying more intensively may finish sooner.
Are there any maths skills I need for the periodic table topics?
Yes. AQA requires students to demonstrate mathematical skills worth at least 20% of the total marks across the three papers. For periodic table topics specifically, you will need to: calculate relative atomic mass from isotopic abundance data; use the ideal gas equation; perform calculations involving Kc and Kp for equilibria; and work with standard electrode potentials. A solid GCSE Maths foundation is strongly recommended.
Start your AQA A-level Chemistry journey with learndirect
Whether you are resitting your A-levels, studying for the first time as an adult learner, or building the qualifications you need for a university application, learndirect's online AQA A-level Chemistry course gives you the flexibility to learn at your own pace, without giving up your work or family commitments.
You will receive structured study materials covering every topic in the AQA specification, including all the periodic table content outlined in this guide, with tutor support to help you work towards the grade you need.
Explore AQA A-level Chemistry at learndirect for flexible online study, expert tutor support, and exams through AQA.
