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Chemistry A
Elements, compounds and mixtures
OCR
J248
Elements, compounds and mixtures
Distinguish between pure substances (elements and compounds) and impure substances (mixtures).
Identify chemically pure substances using melting point data.
Understand the importance of mixtures in useful materials.
Apply various separation methods including filtration, crystallisation, distillation, and chromatography.
Purity and separating mixtures
Define purity in chemical terms versus everyday usage.
Apply arithmetic and mathematical techniques to quantitative chemistry contexts.
Explain and select appropriate separation techniques for specific mixtures.
Interpret chromatographic data to identify substances.
15 Subtopics
1
Quantitative Calculations
Revise
2
Significant Figures
Revise
3
Rearranging Equations
Revise
4
Empirical Formulae Calculations
Revise
5
Defining Purity
Revise
6
Melting Point Analysis
Revise
7
Relative Formula Mass
Revise
8
Deducing Empirical Formulae
Revise
9
Formulations and Mixtures
Revise
10
Separation Techniques
Revise
11
Chromatography Techniques
Revise
12
Phases in Chromatography
Revise
13
Interpreting Chromatograms
Revise
14
Selecting Purification Methods
Revise
15
Chromatography Applications
Revise
Bonding
Use the electron energy level model to explain chemical properties.
Explain chemical reactions in terms of electron loss, gain, or sharing.
Relate atomic structure to the ability to form ionic or covalent bonds.
Describe the formation of ions and the nature of ionic bonding.
Describe the formation of molecules and the nature of covalent bonding.
12 Subtopics
1
Scale Estimation
Revise
2
Structural Representations
Revise
3
Data Translation
Revise
4
Metals vs Non-Metals
Revise
5
Structure and Periodic Position
Revise
6
Electronic Structure and Periodicity
Revise
7
Bonding Types and Structures
Revise
8
Electrostatics in Bonding
Revise
9
Dot and Cross Diagrams
Revise
10
Model Limitations
Revise
11
Reactivity and Electronic Structure
Revise
12
Development of the Periodic Table
Revise
Properties of materials
Explore the physical properties of elements and compounds.
Analyze how the nature of bonding influences material properties.
16 Subtopics
1
3D Chemical Representations
Revise
2
Atomic Scale Relations
Revise
3
Scale Estimation
Revise
4
Standard Form with Nanoparticles
Revise
5
Ratios in Surface Area
Revise
6
Calculating Geometry
Revise
7
Carbon Bonding
Revise
8
Carbon Compounds Diversity
Revise
9
Carbon Allotropes
Revise
10
State Changes and Bonding Forces
Revise
11
Predicting States of Matter
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12
Bulk Properties of Materials
Revise
13
Nanoscale Dimensions
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14
Surface Area to Volume Ratio
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15
Properties and Uses of Nanoparticles
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16
Risks of Nanoparticles
Revise
