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Engaging lessons, revision materials and activities for students of all ages. I studied for a Degree and D.Phil in chemistry at St John's College, Oxford and enjoy a teaching career inspiring and enthusing the next generation.

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Engaging lessons, revision materials and activities for students of all ages. I studied for a Degree and D.Phil in chemistry at St John's College, Oxford and enjoy a teaching career inspiring and enthusing the next generation.
AQA GCSE chemistry - Unit 3 - Lesson 6 concentration, solution, solvent solute and calculations
Professor_BunsenProfessor_Bunsen

AQA GCSE chemistry - Unit 3 - Lesson 6 concentration, solution, solvent solute and calculations

(0)
This is a very chunky powerpoint lesson covering concentrations and solutions questions. Includes full lesson powerpoint and a number of different worksheets with answers in word and pdf format and a practical activity which is also used to recap uncertainty (a concept from earlier in the unit). Professor Bunsen resources are tested in school and make the new GCSE in chemistry engaging and exciting. Most importantly it could save you and your school time! The accompanying worksheet allows students to practice and for you to give feedback and help them to improve. The answers are included to help the busy teacher or non-specialist. These resources have been prepared for the new GCSE science examination specifications that are new for first teaching in 2016. Get ahead with year 9 or use to plan your schemes of work for September. Buy individual resources or a set of lessons. Fully resourced with Powerpoints, worksheets and lesson activities and key facts and opportunities for improvement and redrafting throughout.
AQA A-level Chemistry 3.3.10 Amines, naming and reactions - Full Unit Workbook with Answers
Professor_BunsenProfessor_Bunsen

AQA A-level Chemistry 3.3.10 Amines, naming and reactions - Full Unit Workbook with Answers

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AQA A-level chemistry unit 3.1.10 Amines - Lesson or Revision workbook and notes with answers This workbook covers a whole unit of work combining detailed information sections with Cornell Style note taking so the books can be used while you teach and students can add their own notes and ideas down the margin. I have used colour consistently for the different types of sections to make the booklet more dyslexia friendly as I have found that chemistry notes and questions can often be very dense, and somewhat inaccessible for students who have dyslexia. The workbook can also be produced as a revision guide for the topic and contains all the notes and practice past paper questions you would need to revise along with worked examples. Parent and student friendly. This booklet is 20 pages long with answers to past paper questions provided at the back from page 16 onwards. It is provided in word and pdf. Contents Amine functional group Naming amines with alkyl chains and naming priorities in organic chemistry Preparation of amines by the reaction of ammonia with halogenoalkanes Preparation of aliphatic amines by reduction of nitriles Preparation of aromatic amines by reduction of nitro compounds Basic properties Reactions with acyl compounds and acid anhydrides
AQA A-level Chemistry 3.1.12 Acids and Bases -3 workbooks, dyslexia friendly with Qs and As
Professor_BunsenProfessor_Bunsen

AQA A-level Chemistry 3.1.12 Acids and Bases -3 workbooks, dyslexia friendly with Qs and As

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AQA A-level chemistry unit 3.1.12 Acids and Bases - Three lesson / revision workbooks and notes with answers covering the whole unit. These workbooks cover a whole unit of work combining detailed information sections with Cornell note taking so the books can be used while you teach and students can add their own notes and ideas down the margin. Colour is used consistently for the different types of sections to make the booklet more dyslexia friendly as I have found that chemistry notes and questions can often be very dense, and somewhat inaccessible for all students but especially those who have dyslexia. The booklets can also be produced as a revision guide for the topic and contains all the notes and practice past paper questions you need to revise along with worked examples. Parent and student friendly also. These three work books are provided in word and pdf. Contents Workbook Part 1 - 21 pages Brønsted Lowry Theory - Strong and Weak Acids and Bases Acid Dissociation pH Calculating pH of strong acids The ionic product of water KW Calculating pH of a strong base Workbook Part 2 - 25 pages Weak acid dissociation constant Ka Calculating the pH of a weak acid Determining Ka by experimental methods Titration curves Indicators for titrations Calibrating pH meters Workbook Part 3 - 29 pages Buffer solutions Acidic buffers Basic buffers Calculating the pH of acidic buffer solutions
AQA A-level Chemistry 3.1.2 Amount of Substance - Unit Workbook and Notes with Answers
Professor_BunsenProfessor_Bunsen

AQA A-level Chemistry 3.1.2 Amount of Substance - Unit Workbook and Notes with Answers

(0)
AQA A-level chemistry unit 3.1.2 Amount of Substance - Lesson or Revision workbook with answers This workbook covers a whole unit of work combining detailed information sections with Cornell Style notetaking so the books can be used while you teach and students can add their own notes and ideas down the margin. Colour is used consistently for the different types of sections to make the booklet more dyslexia friendly as I have found that chemistry notes and questions can often be very dense, and somewhat inaccessible for students who have dyslexia. User friendly for students and parents revision too with answers included. This booklet is 46 pages long with answers to past paper questions provided at the back from page 40 onwards. It is provided in word and pdf. Contents Unit conversion The mole and the Avogadro constant Chemical formulae and equations including balancing equations, ionic and half equations Masses, volumes and concentrations in moles and associated calculations Making volumetric solutions Titration Reacting masses, % yield, atom economy Ideal gas equation, pV=nRT Empirical and Molecular Formula Water of crystallisation
AQA GCSE Chemistry 2022 PowerPoint Revision Mat Bundle for Chemistry Unit 1-10  - with completed answer grids!
Professor_BunsenProfessor_Bunsen

AQA GCSE Chemistry 2022 PowerPoint Revision Mat Bundle for Chemistry Unit 1-10 - with completed answer grids!

9 Resources
Contains editable PowerPoint revision mats for AQA chemistry GCSE 9-1. PDF file bundle available at a discount. Unit 1- Atomic Structure and the Periodic Table Unit 2 - Bonding, Structure and the Properties of Matter Unit 3 - Quantitative Chemistry Unit 4 - Chemical Changes and acids and alkalis Unit 5 - Exothermic and endothermic reactions and cells Unit 6 - Rate and extent of chemical change and reversible reactions and dynamic equilibrium Unit 7 - Organic Chemistry Unit 8 - Chemical Analysis Unit 9 - Chemistry of the Atmosphere Unit 10 - Sustainable Development and Earth's Resources
AQA A-level Chemistry - Practice Papers 1, 2 and 3 - clear, space for feedback, mark scheme included
Professor_BunsenProfessor_Bunsen

AQA A-level Chemistry - Practice Papers 1, 2 and 3 - clear, space for feedback, mark scheme included

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A set of three practice A-level papers for AQA A level chemistry. Clear dyslexia friendly presentation with larger print and coloured boxes for answers. Space provided for teacher feedback and/or student reflection. Markschemes included at the back of each document. Genuine exam paper style questions. Content arranged as follows in line with external exams. PDF and Word files provided. Paper 1 What’s assessed Relevant physical chemistry topics (sections 3.1.1 to 3.1.3, 3.1.6 to 3.1.8 and 3.1.10 to 3.1.12) Inorganic chemistry (section 3.1) Relevant practical skills How it’s assessed Written exam: 2 hours 105 marks 35% of A-level Questions 105 marks of short and long answer questions Paper 2 What’s assessed Relevant physical chemistry topics (sections 3.1.2 to 3.1.6 and 3.1.9) Organic chemistry (section 3.3) Relevant practical skills How it’s assessed Written exam: 2 hours 105 marks 35% of A-level Questions 105 marks of short and long answer questions Paper 3 What’s assessed Any content Any practical skills How it’s assessed Written exam: 2 hours 90 marks 30% of A-level Questions 40 marks of questions on practical techniques and data analysis 20 marks of questions testing across the specification 30 marks of multiple choice questions
AQA GCSE chemistry - Unit 4 - Lesson 6 and 7 Titrations and Strong and Weak Acids
Professor_BunsenProfessor_Bunsen

AQA GCSE chemistry - Unit 4 - Lesson 6 and 7 Titrations and Strong and Weak Acids

(1)
This is a pack of two lessons to teach titrations and strong and weak acids with an introduction to the meaning of pH. It has two powerpoints and worksheets in word and pdf format with answers to the worksheet as well. Titration methodology Calculations A3 grid Resources for the neutralisation assessed practical differentiated for higher and foundation tier students The meaning of strong acid in terms of complete ionisation of acid molecules in water The meaning of weak acid in terms of partial ionisation of acid molecules in water Comparison of the terms concentrated and dilute with strong and weak and an explanation of how a weak acid can still be concentrated and a strong acid could still be dilute. Grid to test understanding of key vocabulary in the ppt file. Meaning of pH in terms of the change in 10x each time you go down a pH unit - does not include logarithms it is described in an accessible way that allows students to calculate changes in concentration as pH unit changes. I write Professor Bunsen resources to teach and test in my own classroom. I hope that I manage to make the new GCSE in chemistry engaging and exciting. Most importantly it could save you and your school time!
NGSS Next Generation Science Standards - MS-PS-1 Atoms, Molecules, Properties, Substances K-8 to K-9
Professor_BunsenProfessor_Bunsen

NGSS Next Generation Science Standards - MS-PS-1 Atoms, Molecules, Properties, Substances K-8 to K-9

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Professor Bunsen Alpha Resources tailored to the United States NGSS. This resources is written for MS-PS1-1 and introduces a new character for the USA - Seaborg! Academic Standards - NGSS Develop models to describe the atomic composition of simple molecules and extended structures Disciplinary Core Ideas DCI - PS1.A Structure and Properties of Matter Substances are made from different types of atoms, which combine with one another in various ways. Atoms form molecules that range in size from two to thousands of atoms. (MS-PS1-1). Each pure substance has characteristic physical and chemical properties (for any bulk quantity under given conditions) that can be used to identify it. (MS-PS1-2),(MS-PS1-3). The resources are written by a post-doctoral research chemist from the University of Oxford turned secondary school chemistry teacher. Fully resourced with Powerpoints, worksheets and lesson activities and key facts and opportunities for improvement and redrafting throughout.
AQA 3.2.5 A-level Chemistry Transition Metals - 4 Workbooks Dyslexia Friendly Notes, Qs and As
Professor_BunsenProfessor_Bunsen

AQA 3.2.5 A-level Chemistry Transition Metals - 4 Workbooks Dyslexia Friendly Notes, Qs and As

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AQA A-level chemistry unit 3.2.5 Transition Metals These workbooks cover a whole unit of work combining detailed information sections with Cornell Style notetaking so the books can be used while you teach and students can add their own notes and ideas down the margin. I have used colour consistently for the different types of sections to make the booklet accessible, especially more dyslexia friendly as I have found that chemistry notes and questions can often be very dense, and somewhat inaccessible. Parent and student friendly too with answers. Contents Booklet 1 - 30 pages • The general properties of transition metals and definitions • Metal complexes and ligands • Substitution reactions • Shapes of complex ions Booklet 2 - 24 pages • Formation of coloured ions • Colorimetry and the concentration of transition metal ions in solution • Variable oxidation states • Vanadium species in oxidation states V, IV, III and II • Tollen’s Reagent Booklet 3 - 16 pages • Redox titrations with MnO4- o Calculating the percentage of iron in an iron tablet and moss killer o Calculating the concentration of hydrogen peroxide in hair bleach o Calculating the percentage of iron and carbon in steel o Indirect redox titrations using zinc metal • Redox titrations with other oxidising agents e.g. Cr2O72- Booklet 4 - 19 • Transition metals as catalysts • Heterogeneous catalysts o Contact Process o Haber Process • Homogeneous autocatalysis in the reaction of MnO4- and C2O42- • Homogeneous catalysis by Fe(II)/Fe(III) of reaction of S2O82- and I-
AQA GCSE 2022 Revision Mat Bundle for FOUNDATION TIER Combined Science Chemistry. Now with answer grids!
Professor_BunsenProfessor_Bunsen

AQA GCSE 2022 Revision Mat Bundle for FOUNDATION TIER Combined Science Chemistry. Now with answer grids!

5 Resources
These simple revision mats can be printed A3 with a single sheet forming a revision activity for an entire topic. Include a mixture of cloze word fact sections with recall and exam style questions. Now with free suggested answer sheets to support non-specialists or parents/students revising. Provided as Powerpoint and PDF. 47 revision mat grids covering the whole FOUNDATION TIER COMBINED SCIENCE CHEMISTRY CONTENT ONLY Unit 1 Atomic structure and the periodic table (4 mats) Atoms elements and compounds Mixtures The model of the atom Subatomic particles Size of atoms Relative atomic mass Electronic structure The Periodic Table Metals and non-metals Group 0 Group 1 Group 7 Unit 2 Bonding structure and the properties of matter (4 mats) Chemical bonds Ionic bonding Ionic compounds Covalent bonding Covalent compounds Metallic bonding How bonding and structure are related to the properties of substances State symbols Properties of ionic compounds Properties of small molecules Polymers Giant covalent structures Properties of metals and alloys Metals as conductors Structure and bonding of carbon Unit 3 Quantitative Chemistry (3 mats) Conservation of mass and balanced chemical equations Relative formula mass Mass changes when a reactant or product is a gas Chemical measurements Concentrations of solutions Unit 4 Chemical Changes (9 mats) The reactivity of metals The reactivity series Extraction of metals and reduction Reactions of acids with metals Neutralisation of acids and salt production Soluble salts The pH scale and neutralisation Electrolysis of molten ionic compounds Electrolysis in aqueous solution Using electrolysis to extract metals Unit 5 Energy Changes (3 mats) Exothermic and endothermic reactions Energy transfer during exothermic and endothermic reactions Reaction profiles Unit 6 The rate and extent of chemical change (5 mats) Rate of reaction Factors which affect the rate of chemical reactions Collision theory and activation energy Catalysts Reversible reactions Energy changes and reversible reactions Equilibrium Unit 7 - Organic Chemistry (3 mats) Carbon compounds as fuels and feedstock Fractional distillation and petrochemicals Properties of hydrocarbons Cracking and alkenes Unit 8 - Chemical analysis (4 mats) Pure substances Formulations Chromatography Identification of common gases Unit 9 - Chemistry of the atmosphere (6 mats) The composition and evolution of the Earth’s atmosphere The proportions of different gases in the atmosphere The Earth’s early atmosphere How oxygen increased How carbon dioxide decreased Carbon dioxide and methane as greenhouse gases Human activities which contribute to an increase in greenhouse gased in the atmosphere Global climate change The carbon footprint and its reduction Common atmospheric pollutants and their sources Atmospheric pollutants from fuels Properties and effects of atmospheric pollutants Unit 10 - Using resources (6 mats) Using the Earth’s resources Potable water Waste water treatment Alternative methods of extracting metals Life cycle assessment Recycling Ways of reducing the use of resources.
Chemical equations bundle - including word, symbol and an introduction to ionic and half equations
Professor_BunsenProfessor_Bunsen

Chemical equations bundle - including word, symbol and an introduction to ionic and half equations

(0)
This bundle of resources contains powerpoints and worksheets to help you introduce students to: 1) Naming chemical compounds 2) Writing word equations 3) Practical investigation into a simple reaction to understand conservation of mass 4) Interpreting symbol formulae 5) Balancing chemical equations 6) Basic introduction to ionic equations and spectator ions 7) Basic introduction to redox half equations and balancing equations using electrons. Professor Bunsen resources are tested in school and make the chemistry engaging and exciting. Most importantly it could save you and your school time! The accompanying worksheets allow students to practice and for you to give feedback and help them to improve. The answers are included to help the busy teacher or non-specialist. Files are also saved as their PDF versions which are compatible with iBooks, mobiles and tablets. These resources have been prepared by a post-doctoral Oxford University educated chemistry teacher and director of school science. Fully resourced with Powerpoints, worksheets and lesson activities and key facts and opportunities for improvement and redrafting throughout.
AQA GCSE Revision Mat Bundle for Chemistry Unit 1-5 now with answer grids!
Professor_BunsenProfessor_Bunsen

AQA GCSE Revision Mat Bundle for Chemistry Unit 1-5 now with answer grids!

4 Resources
UPDATED 09/2018 These simple revision mats can be printed A3 with a single sheet forming a revision activity for an entire topic. With free suggested answers typed and handwritten onto completed sheets. These files are PowerPoints which you can tweak for your classroom if desired (but please do not re-distribute). Non-editable PDF files available separately at a discount. Contains PowerPoint Revision mats for AQA chemistry GCSE 9-1 Unit 1- Atomic Structure and the Periodic Table Unit 2 - Bonding, Structure and the Properties of Matter Unit 3 - Quantitative Chemistry Unit 4 - Chemical Changes Unit 5 - Exothermic and endothermic reactions and cells
Balancing Chemical Equations - word, symbol, ionic and half equations, practical and worksheets
Professor_BunsenProfessor_Bunsen

Balancing Chemical Equations - word, symbol, ionic and half equations, practical and worksheets

(1)
A complete resource to enable you to teach chemical equations effectively. L3 - introducing word equations and how to interpret and write them L4 - investigating stoichiometry and change in mass when magnesium burns in air L5 - symbol equations including understanding how to name compounds and balance equations. Worksheets for each lesson and answers also provided. Extension materials on worksheets introduces the concept of ionic equations and redox half equations as well. Professor Bunsen resources are tested in school and make chemistry engaging and exciting. Most importantly it could save you and your school time! The accompanying worksheets allow students to practice and for you to give feedback and help them to improve. The answers are included to help the busy teacher or non-specialist. The resources are written by a post-doctoral research chemist from the University of Oxford turned secondary school chemistry teacher. Fully resourced with Powerpoints, worksheets and lesson activities and key facts and opportunities for improvement and redrafting throughout.
AQA GCSE Chemistry Required Practical Activities - Bundle Pack containing  activities 1-4 inc. MS
Professor_BunsenProfessor_Bunsen

AQA GCSE Chemistry Required Practical Activities - Bundle Pack containing activities 1-4 inc. MS

(0)
Required practicals will replace controlled assessment in the new GCSE. This bundle of resources contains worksheets for the first 5 practical activities along with expected results and mark scheme as appropriate. PA 1 Making Salts PA 2 Neutralisation Higher Tier PA 2 Neutralisation Foundation Tier PA 3 Electrolysis PA 4 Temperature Changes These record and worksheets are much more than a method. They are designed to track students performance towards achieving their apparatus and skills and provide information to help them understand the background chemistry which is key to understanding an experiment and not just completing it. All the sheets can be bound together in-house into a Required Practicals workbook/log book, or you could hand the sheets out separately. Practical work may be assessed through the terminal examinations - be sure that your students haven’t just done the practicals but understand them fully! AQA state: Practical work is at the heart of science – that’s why we have placed it at the heart of each of our GCSE science specifications. By carrying out carefully considered practical work, students will enhance their investigative thinking, improve their mastery of techniques and consolidate their understanding of key scientific concepts. Professor Bunsen resources are tested in school and make the new GCSE in chemistry engaging and exciting. Most importantly it could save you and your school time and support your students to understand the practical work in greater depth.
AQA 9-1 GCSE Chemistry - Unit 1 - 7 lessons - Atoms and Elements to Separating Mixtures
Professor_BunsenProfessor_Bunsen

AQA 9-1 GCSE Chemistry - Unit 1 - 7 lessons - Atoms and Elements to Separating Mixtures

(0)
This premium resource pack is contains all the resources for 7-10 complete lessons with Powerpoints, worksheets, lesson activities, hints and tips. Discount compared with buying separately! PDF files and word documents included for easy viewing on tablet or computer. L1 - Atoms and elements - includes lesson powerpoint. L2 - Observing and carrying out chemical reactions - includes lesson powerpoint, revision handouts and worksheet with answers. L3 - Word Equations - lesson powerpoint, revision handouts and worksheet with answers. L4 - Practical to burn magnesium in air - lesson powerpoint and worksheet with method, results and analysis. L5 - Balancing chemical equations including ionic and half equations - lesson powerpoint, revision handouts and worksheets with answers including extension worksheets on ionic equations and half equations. L6 - Separating mixtures part 1 - techniques and practicals (enough for 2 lessons) including powerpoint, revision notes. L7 - Separating mixtures part 2 - chromatography - lesson powerpoint, revision handouts and worksheet with answers The accompanying worksheets allow students to practice and for you to give feedback and help them to improve. The answers are included to help the busy teacher or non-specialist. Professor Bunsen resources are tested in school and make the new GCSE in chemistry engaging and exciting. Most importantly it could save you and your school time! These resources have been prepared for the new GCSE science examination specifications that are new for first teaching in 2016. Get ahead with year 9 or use to plan your schemes of work for September. Buy individual resources or a set of lessons. Fully resourced with Powerpoints, worksheets and lesson activities and key facts and opportunities for improvement and redrafting throughout.
GCSE Chemistry Required Practical Activities - Bundle Pack containing activities 5-8 inc. MS
Professor_BunsenProfessor_Bunsen

GCSE Chemistry Required Practical Activities - Bundle Pack containing activities 5-8 inc. MS

(0)
Required practicals will replace controlled assessment in the new GCSE. This bundle of resources contains worksheets for the first 5 practical activities along with expected results and mark scheme as appropriate. PA 5 Rates of chemical reaction foundation tier PA 5 Rates of chemical reaction higher tier PA 6 Chromatography PA 7 Identifying ions PA 8 Purifying water These record and worksheets are much more than a method. They are designed to track students performance towards achieving their apparatus and skills and provide information to help them understand the background chemistry which is key to understanding an experiment and not just completing it. All the sheets can be bound together in-house into a Required Practicals workbook/log book, or you could hand the sheets out separately. Practical work may be assessed through the terminal examinations - be sure that your students haven’t just done the practicals but understand them fully! AQA state: Practical work is at the heart of science – that’s why we have placed it at the heart of each of our GCSE science specifications. By carrying out carefully considered practical work, students will enhance their investigative thinking, improve their mastery of techniques and consolidate their understanding of key scientific concepts. Professor Bunsen resources are tested in school and make the new GCSE in chemistry engaging and exciting. Most importantly it could save you and your school time and support your students to understand the practical work in greater depth.
Revise GCSE 2022 AQA Chemistry - Full revision resource for Paper 1H notes, questions and activities
Professor_BunsenProfessor_Bunsen

Revise GCSE 2022 AQA Chemistry - Full revision resource for Paper 1H notes, questions and activities

10 Resources
This is a Higher Tier Chemistry resource containing concise revision notes, activities and exam style questions with mark schemes that have been created to be specific to the Paper 1H 2022 Advance information from AQA. Cornell note style booklet with ribbon for students to take their own notes as they use the booklet to revise or as you deliver the revision session. Each booklet should take about 1 hour to complete. Structure your revision around these and spend less time making notes and more time practicing applying your knowledge. This bundle contains ALL the booklets to help students to prepare for the major focus of the content of Paper 1H. AQA Advance Information 2022 • 4.1.2 The periodic table • 4.2.1 Chemical bonds, ionic, covalent and metallic • 4.2.2 How bonding and structure are related to the properties of substances • 4.2.3 Structure and bonding of carbon • 4.3.2 Use of amount of substance in relation to masses of pure substances • 4.4.1 Reactivity of metals • 4.4.2 Reactions of acids • 4.4.3 Electrolysis • 4.5.1 Exothermic and endothermic reactions Required practical activities that will be assessed: • Required practical activity 1: preparation of a pure, dry sample of a soluble salt from an insoluble oxide or carbonate, using a Bunsen burner to heat dilute acid and a water bath or electric heater to evaporate the solution. • Required practical activity 2: determination of the reacting volumes of solutions of a strong acid and a strong alkali by titration. • Required practical activity 4: investigate the variables that affect temperature changes in reacting solutions such as, eg, acid plus metals, acid plus carbonates, neutralisations, displacement of metals.
New AQA A-level Chemistry foldable FLASH CARDS of definitions for ALL year 1 and AS topics
Professor_BunsenProfessor_Bunsen

New AQA A-level Chemistry foldable FLASH CARDS of definitions for ALL year 1 and AS topics

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Support your students to learn the definitions they need for all the year 1 and AS topics in the new specification A-level chemistry! Each word document contains definitions that can be cut, individually folded over and used to revise or learn the accepted AQA definitions of key words and concepts for every topic. Students should print the sheets in A3 or A4 and then cut each definition into a strip. Fold over and glue together to give a robust card. Shuffle and test yourself or each other. Keep each topic separate or mix it up, the units are marked on each card so they can easily be re-sorted. Fold and laminate for a longer lasting set. Good for starter activities, revision and test yourself! This resource contains definitions for: 3.1.1 Atomic structure 3.1.2 Amount of substance 3.1.3 Bonding 3.1.4 Energetics 3.1.5 Kinetics 3.1.6 Equilibria 3.1.7 Redox 3.2.1 Periodicity 3.2.2 Group 2 the alkaline earth metals 3.2.3 Group 7 the halogens 3.3.1 Introduction to organic chemistry 3.3.2 Alkane 3.3.3 Halogenoalkanes 3.3.4 Alkenes 3.3.5 Alcohols 3.3.6 Organic Analysis