positive ions surrounded by a sea of free electrons. the positive and negative atoms and ions have a strong electrostatic fore of A. Bendy- in layers= slide
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an alloy is stronger because?
theres a size difference between atoms and this disrupts a metals regular structure stopping the layers sliding.
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4 facts about a giant ionic lattice?
'+' and '-' ions grouped 2gether in regular arrangement. strong ionic bonds.=high MP and BP. strong electrostatic forces. do not conduct=no free electrons + ions are not free to move
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4 facts about simple?
weak intermolecular bonds but strong covavalent bonds. low energy to break bends. do not conduct
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the carbon in diamond forms all four bonds. T/F?
TRUE this is why it does not conduct and has a very high MP & BP
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graphite also has its carbon make all four bonds? T/F?
FALSE. the carbon only makes 3 bonds
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the free delocalised electron in graphite means.....?
it can conduct, the electron moves throughout the structure
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what is graphites structure like?
layered= slides and slips
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what is a fullerine?
a hexagonal ring made up of carbon which makes 3 bonds.a covalent bond.
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nano science is the study of tiny sized materials T/F?
TRUE 1x10-9 to be exact
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a fact about nanoscience?
they have a high surface area to volume ratio which means they give heat out very easily
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