All Structure and bonding articles – Page 9
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ExperimentInvestigating hydrogels in nappies and hair gel
Investigate hydrogels as polymeric smart materials in this series of activities using nappies and hair gel. Includes kit list and safety instructions.
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Large molecules
The Inspirational chemistry chapter ‘Large molecules’. This chapter suggests games, activities, practicals and demonstrations for teaching various topics, such as polmers, emulsifiers and textile conservation.
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Exhibition chemistry
Red hot carbon
Declan Fleming shows you how to capture your students’ imaginations with spectacular demonstrations
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Swimming pool chemistry | 16–18 years
Synoptic questions explore structure and bonding, equilibrium and spectrometry and spectroscopy in the context of swimming pools.
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Shapes of molecules and ions
This activity draws some extra concepts and mathematical skills into the discussion of molecular shape. A distinction between geometry around the central atom and the shape of the molecule is made.
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Oxidation numbers
This activity introduces oxidation numbers by giving a conceptual foundation for them in terms of electron accounting and polar bonds. It then shows how the model used so far needs refining.
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Formal charge
This activity introduces formal charge – a useful tool which otherwise might not be taught. The formal charge model treats bonds as pure covalent, in contrast to the oxidation state model which treats bonds as ionic.
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Covalent bonding
This activity seeks to develop an understanding of covalent bonding in terms of energetic stability rather than full shells.
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Ionic bonding
An explanation often given for ionic bonding is that atoms lose or gain electrons to achieve noble gas configurations. This activity evaluates that as a complete explanation.
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Bonding models
This activity gets the students to think of the model they have been taught as a model rather than the truth.
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Carbon - the element with several identities
The student worksheet includes information about Sir Harry Kroto, one of the team who discovered the third allotrope of carbon, buckminsterfullerene.
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Elements infographics
A collection of visually stimulating and informative infographics about the elements, which would make a valuable addition to any science classroom.
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Education in Chemistry: molymod competition worksheets
We are pleased to announce the winners of the 2013 Education in Chemistry molymod competition. The winning worksheet was designed by Mary Wong, with Catherine Smith and Matthew Standford coming in as runner-ups.
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What is honey made of? The optical rotation of sugars
Measure the optical rotation of honey and use this data to determine which optically active sugar is present in the highest concentration.
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Only dust - is there a sign of life?
Determine whether the sample of dust originates from a living source or a non-living source and design a test for the dust sample that exploits a physical property of organic molecules from living sources, using only the equipment provided.
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Liquid and solid water; the growth of ice crystals
Design an experiment to measure the rate at which ice freezes (or melts) ands use the findings to investigate how ponds freeze.
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News
Super-dipoles create chloroform’s super powers
Polar stacks facilitate dissolution by polarising
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The Mole
Chemistry is like… dating
Tom Husband thinks about how chemical bonding might be similar to personal relationships
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Feature
Pictures of the molecular world
Matthew Lickiss looks back at how our drawings of chemical structures have changed over time
