Chemistry: 97 interactive topics
Atoms, bonding, reactions, the periodic table, organic chemistry and the chemistry of everyday life.
About Chemistry at secondary level
Chemistry on LearnViz SecondaryEdu has 97 interactive topics. Chemistry links what you can see in the lab to the particles and bonds behind it, so each topic here shows that link in a model.
Every topic has a clear definition, key points written for secondary school, an animation you can control, and a three-question quiz. Topics are independent, so you can start anywhere.
How to study Chemistry with LearnViz
- Start with a topic you already know a little about, then move to one that is new to you.
- Use the animation before you read the key points. Predicting the result first makes the explanation easier to remember.
- Finish each quiz, then review the questions you got wrong. Mark a topic complete once you can explain it in your own words.
- Draw the particles for one example. A labelled diagram is a quick way to check your understanding.
97 topics
1Matter and Its PropertiesMatter is anything that has mass and takes up space, and it has…2States of MatterMatter exists mainly as solid, liquid or gas, each with its own…3Changes of StateA change of state occurs when heating or cooling changes the energy…4Particle TheoryThe particle model states that all matter is made of tiny particles…5DiffusionDiffusion is the spreading of particles from a region of high…6Elements, Compounds and MixturesElements contain one type of atom, compounds contain different…7Atomic StructureAtoms contain protons and neutrons in the nucleus and electrons…8Electron ConfigurationElectron configuration describes how electrons are arranged in…9Isotopes and Relative Atomic MassIsotopes are atoms of one element with different neutron numbers,…10History of the AtomOur model of the atom has developed from Dalton's solid spheres to…11The Periodic TableThe periodic table arranges elements in order of atomic number so…12Groups and PeriodsElements in the same group have the same number of outer electrons,…13Group 1: Alkali MetalsThe alkali metals are soft, reactive metals in Group 1 that react…14Group 7: HalogensThe halogens are reactive non-metals in Group 7 that form salts…15Group 0: Noble GasesThe noble gases are unreactive gases in Group 0 with full outer…16Transition MetalsTransition metals are dense, strong metals in the centre of the…17Metals and Non-MetalsMetals are shiny conductors that are malleable, while non-metals…18Ionic BondingIonic bonding is the attraction between oppositely charged ions…19Covalent BondingCovalent bonding is the sharing of pairs of electrons between…20Metallic BondingMetallic bonding is the attraction between positive metal ions and…21Properties of Ionic CompoundsIonic compounds have high melting points and form crystals, because…22Properties of Simple MoleculesSimple molecular substances have low melting and boiling points…23Giant Covalent StructuresGiant covalent substances such as diamond and silicon dioxide have…24Allotropes of CarbonAllotropes are different forms of the same element, such as…25NanoparticlesNanoparticles are extremely small particles between 1 and 100…26Chemical FormulaeA chemical formula uses symbols and numbers to show which elements…27Writing Chemical EquationsA chemical equation shows reactants turning into products using…28Balancing EquationsBalancing an equation means adjusting coefficients so there are…29Conservation of MassThe law of conservation of mass says that atoms are neither created…30Relative Formula MassRelative formula mass is the sum of the relative atomic masses of…31The MoleA mole is the amount of substance containing 6.02 x 10 to the 23…32Reacting MassesReacting mass calculations use balanced equations and moles to work…33Percentage Yield and Atom EconomyPercentage yield compares actual product to the theoretical…34Concentration of SolutionsConcentration measures how much solute is dissolved in a given…35Molar Volume of GasesOne mole of any gas occupies 24 dm3 at room temperature and…36Acids and AlkalisAcids release hydrogen ions in water and alkalis release hydroxide…37The pH ScaleThe pH scale runs from 0 to 14 and measures how acidic or alkaline…38Strong and Weak AcidsStrong acids ionise completely in water, while weak acids only…39NeutralisationNeutralisation is the reaction of an acid with a base that forms a…40Making Soluble SaltsSoluble salts are made by reacting an acid with a metal, base or…41Insoluble Salts and PrecipitationA precipitation reaction forms an insoluble solid when two…42TitrationTitration is an accurate technique that finds the concentration of…43Reactivity SeriesThe reactivity series ranks metals in order of how readily they…44Displacement ReactionsA more reactive metal displaces a less reactive metal from its…45Extraction of MetalsMetals are extracted from their ores by reduction with carbon or by…46Oxidation and ReductionOxidation is the gain of oxygen or loss of electrons, and reduction…47Rusting and CorrosionRusting is the corrosion of iron by oxygen and water, forming…48ElectrolysisElectrolysis uses electricity to break down an ionic compound that…49Electrolysis of Aqueous SolutionsIn aqueous electrolysis water also provides ions, so the products…50ElectroplatingElectroplating is the use of electrolysis to coat an object with a…51Electrochemical CellsAn electrochemical cell produces electricity from a chemical…52Rates of ReactionThe rate of reaction is how quickly reactants are used up or…53Collision TheoryCollision theory says that reactions occur only when particles…54Factors Affecting Reaction RateReaction rate increases with higher temperature, concentration,…55Catalysts and EnzymesA catalyst speeds up a reaction without being used up, and enzymes…56Exothermic and Endothermic ReactionsExothermic reactions release heat to the surroundings, while…57Energy Level DiagramsEnergy level diagrams show the energy of reactants and products and…58Bond EnergiesBond energy is the energy needed to break a bond, and the overall…59Reversible ReactionsA reversible reaction can go in both directions, so products can…60Chemical EquilibriumEquilibrium is reached in a closed system when the forward and…61The Haber ProcessThe Haber process makes ammonia from nitrogen and hydrogen under…62Fertilisers and AgricultureFertilisers supply nutrients such as nitrogen, phosphorus and…63Fuels and CombustionCombustion is the rapid reaction of a fuel with oxygen, releasing…64Crude Oil and Fractional DistillationCrude oil is a mixture of hydrocarbons separated into useful…65AlkanesAlkanes are saturated hydrocarbons with only single bonds between…66AlkenesAlkenes are unsaturated hydrocarbons containing a carbon-carbon…67CrackingCracking breaks long hydrocarbon molecules into shorter, more…68PolymersPolymers are very large molecules made from many small repeating…69AlcoholsAlcohols are organic compounds containing an OH group, such as…70Carboxylic Acids and EstersCarboxylic acids contain the COOH group and react with alcohols to…71Homologous Series and Functional GroupsA homologous series is a family of organic compounds with the same…72IsomersIsomers are compounds with the same molecular formula but different…73Separation TechniquesMixtures are separated using physical methods such as filtration,…74ChromatographyChromatography separates substances in a mixture because they move…75Purity and Melting PointsA pure substance has a sharp, fixed melting point, while impurities…76Water TreatmentWater is made safe to drink by filtering it and adding chlorine,…77Hard and Soft WaterHard water contains dissolved calcium and magnesium ions that make…78Air and Its CompositionDry air is about 78 percent nitrogen and 21 percent oxygen, with…79Atmospheric PollutionAtmospheric pollution comes from burning fuels and releases gases…80The Greenhouse EffectThe greenhouse effect is the trapping of heat by gases such as…81Climate Change and ChemistryClimate change is a long-term shift in global temperatures and…82Recycling and Life Cycle AssessmentRecycling reuses materials, and a life cycle assessment measures…83Tests for GasesSimple tests identify common gases, such as a squeaky pop for…84Flame Tests and Cation TestsFlame tests and sodium hydroxide precipitates help identify metal…85Tests for AnionsSpecific chemical tests identify negative ions like carbonate,…86Instrumental AnalysisModern chemists use instruments such as spectrometers to identify…87Solubility and Saturated SolutionsSolubility is the maximum amount of solute that dissolves in a…88CrystallisationCrystallisation forms pure solid crystals as a hot saturated…89Colloids, Suspensions and SolutionsSolutions are uniform mixtures, suspensions contain particles that…90Thermal DecompositionThermal decomposition is a reaction in which a compound breaks down…91Chemistry of the Atmosphere LayersThe atmosphere has layers, including the troposphere where weather…92Ceramics, Glass and CompositesCeramics and glass are made from non-metal compounds heated to high…93AlloysAn alloy is a mixture of a metal with other elements that makes it…94Chemical Industry and SustainabilityThe chemical industry makes vital products, and sustainable…95Hydrogen and Fuel CellsA hydrogen fuel cell reacts hydrogen with oxygen to produce…96Lab Safety and EquipmentLaboratory safety involves wearing protective equipment, handling…97Chemistry in Everyday LifeChemistry explains cooking, cleaning, medicines and materials,…
Chemistry: frequently asked questions
How many topics are in Chemistry?
Chemistry has 97 interactive topics on this site. Each one has its own page, so you can study them in any order.
Is Chemistry free to use?
Yes. Every topic, animation and quiz can be used in your browser without creating an account. Your progress is saved only on your own device.
Who is the Chemistry content for?
It is written for secondary school students studying Chemistry, and for teachers or parents who want a clear visual explanation. It supports your syllabus and your teacher rather than replacing them.
How do I move between topics?
Each topic page has Previous and Next links, a list of related topics, and a search box in the header. You can also filter the list on this page to find a topic by name.