Bonding and structure written questions
Explain bonding and structure in G3 Science Chemistry through written questions, using marking guidance to check models and properties.
Learning goals
- Describe how atoms lose or gain electrons to form ions, which usually have a noble-gas electronic configuration
- Describe ionic bonding between metals and non-metals, such as in NaCl and MgCl₂, using dot-and-cross diagrams
- Relate the physical properties of ionic compounds, including electrical conductivity, to their lattice structure
- Describe a covalent bond as a shared pair of electrons, with the bonded atoms usually reaching a noble-gas electronic configuration
- Draw dot-and-cross diagrams for covalent bonds between non-metals, such as in H₂, O₂, H₂O, CH₄ and CO₂
- Deduce the electron arrangement in other covalent molecules
- Relate the physical properties of covalent substances, including electrical conductivity, to their structure and bonding
- Describe how elements, compounds and mixtures differ
- Describe the typical physical properties of solid metals: high melting and boiling points, malleability and good conduction of heat and electricity
- Describe an alloy as a mixture of a metal with another element, such as brass or stainless steel
- Recognise metals and alloys in structure diagrams
Use the feedback to improve your answers; this practice does not count towards your progress.
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Paper instructions
Practise
Practise questions on the skills you are learning. This is for practice only and doesn’t count towards your course progress.
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- About 10 minutes.
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Beyond the syllabus: optional enrichment that does not count towards your progress.