Compounds and mixtures
Chemistry · Unit 1 — Chemical fundamentals — structure, properties and reactions · Properties and structure of materials
Learning objectives (15)
LO-1Analyse data to determine the physical properties of pure substances and mixtures. Chem istry 2025 v1.3 Bonding and propertiesLO-2Analyse data to determine the properties, structure and bonding of ionic, covalent and metallic compounds.LO-3Describe the properties of ionic, covalent and metallic compounds, e.g. melting and boiling point, thermal and electrical conductivity, strength and hardness.LO-4Discriminate between covalent molecules, giant covalent networks and allotropes of carbon.LO-5Discriminate between heterogeneous and homogeneous mixtures.LO-6Discriminate between ionic and metallic bonding.LO-7Explain that hydrocarbons, including alkanes (saturated), alkenes (u nsaturated) and benzene, have different chemical properties that are determined by the nature of the bonding within the molecules.LO-8Explain that the type of bonding within ionic, metallic and covalent substances determines their physical properties.LO-9Explain the properties of covalent compounds by modelling covalent bonding as the sharing of an electron pair in the region between two nuclei with a strong electrostatic force of attraction between both nuclei.LO-10Explain the properties of ionic compounds by modelling ionic bonding as ions arranged in a crystalline lattice structure with strong electrostatic forces of attraction between oppositely charged ions.LO-11Identify that pure substances have distinct measurable properties (e.g. melting and boiling point, reactivity, strength, density) and mixtures have properties dependent on the identity and relative amounts of the substances that make them up.LO-12State that pure substances may be elements or compounds.LO-13tests to distinguish alkanes and alkenes.* *Note: Simulations may be used. Chem istry 2025 v1.3LO-14the properties of ionic, metallic, and covalent compoundsLO-15the separation of mixtures based on physical properties
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