Chapter 4: Elements, Compounds and Mixtures Notes

Sections

1. 4A Atoms and the particle model Mastered

   The particle model of matter, what atoms are, the protons, neutrons and electrons inside them, atomic number and mass number, ions and isotopes, and how experiments revealed the structure of the atom.

   Open notes
2. 4B Elements and the periodic table Mastered

   What an element is, chemical symbols and where they come from, how Mendeleev organised the elements, groups and periods, metals, non-metals and metalloids on the periodic table, and how new elements are discovered and named.

   Open notes
3. 4C Physical and chemical properties Mastered

   The difference between physical and chemical properties, including state, melting and boiling point, density, conductivity, malleability, ductility and viscosity, and flammability, reactivity, corrosion and toxicity, and how to test an unknown element.

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4. 4D Metals, non-metals and allotropes Mastered

   The typical properties of metals and non-metals, how a lattice of positive particles in a sea of electrons explains metals, monatomic and diatomic non-metals, the allotropes of carbon (diamond, graphite and graphene), and the uses of elements such as gold, iodine, helium, sulfur and oxygen.

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5. 4E Compounds and chemical formulas Mastered

   What a compound is, how compounds differ from the elements they contain, molecular and lattice compounds, reading chemical formulas, decomposition, and common compounds such as water, carbon dioxide, sodium chloride and iron oxide.

   Open notes
6. 4F Mixtures Mastered

   What a mixture is, how mixtures differ from compounds, homogeneous and heterogeneous mixtures, alloys, classifying matter using particle diagrams, and why Australian beaches have different coloured sand.

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7. 4G Materials through history Mastered

   How people in different cultures have used elements and compounds, from First Nations Australians' stone, ochre, resin and plant fibre technologies to the Stone, Copper, Bronze and Iron Ages, smelting, alloys and steel.

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8. 4H Elements in the modern world Mastered

   How we extract and use metals today, including electrolysis of copper and aluminium, steel and sulfuric acid, the elements inside a smartphone, Australia's critical minerals, and why recycling matters when resources are limited.

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9. 4I Elements, compounds and mixtures review Mastered

   A summary of the whole Elements, Compounds and Mixtures chapter, key words, and a mixed test covering atoms, the periodic table, properties, metals and non-metals, compounds and formulas, mixtures and the history and modern uses of materials.

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