The particles do not melt
Explain a change of state using what we observe, what particles do and the symbols we write.
Open the complete free lessonSubject → stage → topic → lesson
Chemistry Lab
Connect observation, particle explanation and symbolic reasoning. All activities here are virtual; no hazardous experiment is needed.
A precise international curriculum fit requires the learner’s jurisdiction, year, specification, tier where relevant and school scheme.
7 lesson found. This published collection is growing and is not a complete syllabus. Browse all registered public topics.
Count particles without changing the element
Use atomic and mass numbers to count protons, neutrons and electrons, and explain why making an ion does not change element identity.
Open the complete free lessonCharged particles need a path to conduct
Distinguish ion formation from ionic bonding, use charge balance to write a formula and explain solid versus molten conductivity.
Open the complete free lessonBalance atoms, preserve the substances
Balance an equation by changing coefficients, count every atom and distinguish an amount ratio from a mass ratio.
Open the complete free lessonThe mole connects a balance to particles
Calculate a compound's molar mass, convert between grams and moles with units and distinguish amount from a particle count.
Open the complete free lessonNeutralisation: follow the reacting ions
Represent a dilute strong-acid/strong-base neutralisation, identify spectator ions and calculate reacting amounts with correct volume units.
Open the complete free lessonA chromatogram is evidence, not a barcode
Calculate dimensionless Rf values from a common baseline and judge what a chromatogram can and cannot establish.
Open the complete free lessonExplore the registered curriculum.
Published lessons and registered topics have different availability labels. Private assessments and tutor solution banks remain protected.
99 curriculum entries match. 7 complete free lessons are published across the catalogue. Registered entries include learning resources and examination contexts; they are not all online lessons.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Particle model, states of matter and diffusion
Use particle arrangement/motion to explain bulk state changes and diffusion
Learning goals, prerequisites and source context
- Strand
- Matter, Particles & States
- Topic
- Particle model, states of matter and diffusion
- Prerequisites
- C00 observation language
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C01-001 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Atomic structure, nuclear notation and models
Relate proton/neutron/electron counts to atomic/mass number, charge and identity
Learning goals, prerequisites and source context
- Strand
- Atomic Structure & Isotopes
- Topic
- Atomic structure, nuclear notation and models
- Prerequisites
- C01 matter; integer arithmetic
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C02-001 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Ionic bonding, lattices and properties
Explain ionic formation and bulk properties from lattice structure and electrostatic attraction
Learning goals, prerequisites and source context
- Strand
- Bonding, Structure & Properties
- Topic
- Ionic bonding, lattices and properties
- Prerequisites
- C02-C03 electron/ion reasoning
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C04-001 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Chemical equations, state symbols and conservation
Write/balance equations as conservation statements and interpret coefficients as particle/mole ratios
Learning goals, prerequisites and source context
- Strand
- Chemical Formulae, Equations & Representation
- Topic
- Chemical equations, state symbols and conservation
- Prerequisites
- correct formulae; atom counting
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C05-003 · Phase 5B · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Relative mass, molar mass and mass-mole-particle conversions
Move among mass, moles and particle count while preserving formula composition and units
Learning goals, prerequisites and source context
- Strand
- Mole Concept & Stoichiometry
- Topic
- Relative mass, molar mass and mass-mole-particle conversions
- Prerequisites
- JEM-CH-C06-001; relative masses
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C06-002 · Phase 5B · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Neutralisation, ionic equations and acid reaction patterns
Predict common acid reactions and represent net ionic neutralisation/carbonate chemistry
Learning goals, prerequisites and source context
- Strand
- Acids, Bases & Salts
- Topic
- Neutralisation, ionic equations and acid reaction patterns
- Prerequisites
- C05 balanced/ionic equations; C06 stoichiometry
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C08-003 · Phase 5C · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Chromatography, Rf & separation evidence
Separation evidence with controlled comparison
Learning goals, prerequisites and source context
- Strand
- Analytical Chemistry
- Topic
- Chromatography, Rf & separation evidence
- Prerequisites
- Secure relevant C00-C12 prerequisites
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C16-002 · Phase 5D · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
Chemistry · Senior Secondary / GCSE / IGCSE / HS
Measurement, SI units, significant figures and uncertainty
Record and communicate measurements with appropriate precision and uncertainty
Learning goals, prerequisites and source context
- Strand
- Scientific Foundations & Laboratory Reasoning
- Topic
- Measurement, SI units, significant figures and uncertainty
- Prerequisites
- Basic numeracy; unit conversion
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C00-001 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
The topic is registered. A complete public lesson has not yet been released; no download or purchase is offered here.
Explore this topic →Chemistry · Senior Secondary / GCSE / IGCSE / HS
Experimental design, variables, apparatus, tables and graphs
Plan fair tests, distinguish variables and represent evidence in tables/graphs
Learning goals, prerequisites and source context
- Strand
- Scientific Foundations & Laboratory Reasoning
- Topic
- Experimental design, variables, apparatus, tables and graphs
- Prerequisites
- C00 measurement
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C00-002 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
The topic is registered. A complete public lesson has not yet been released; no download or purchase is offered here.
Explore this topic →Chemistry · Senior Secondary / GCSE / IGCSE / HS
Mixtures, separation, pure substances and physical/chemical change
Select separation methods from property differences and distinguish physical from chemical change
Learning goals, prerequisites and source context
- Strand
- Matter, Particles & States
- Topic
- Mixtures, separation, pure substances and physical/chemical change
- Prerequisites
- C01 particle model
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C01-002 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
The topic is registered. A complete public lesson has not yet been released; no download or purchase is offered here.
Explore this topic →Chemistry · Senior Secondary / GCSE / IGCSE / HS
Isotopes and relative atomic mass
Explain isotopes and calculate weighted relative atomic mass from abundance data
Learning goals, prerequisites and source context
- Strand
- Atomic Structure & Isotopes
- Topic
- Isotopes and relative atomic mass
- Prerequisites
- C02 atomic structure; percentages
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C02-002 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
The topic is registered. A complete public lesson has not yet been released; no download or purchase is offered here.
Explore this topic →Chemistry · Senior Secondary / GCSE / IGCSE / HS
Electron arrangement, valence electrons and ion formation
Connect electron arrangement to group position, ion formation and chemical behaviour
Learning goals, prerequisites and source context
- Strand
- Atomic Structure & Periodicity
- Topic
- Electron arrangement, valence electrons and ion formation
- Prerequisites
- C02 atomic structure
- Context
- Cross-system core · Global / learner-fit
- Record
- JEM-CH-C02-003 · Phase 5A · Lesson
These are curriculum-fit contexts, not claims that qualifications or grade levels are equivalent. Check the learner’s actual specification and school scheme.
The topic is registered. A complete public lesson has not yet been released; no download or purchase is offered here.
Explore this topic →