metallic- positve ions attracted to negatively charge declocalised electrons from outer shell of metal
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What are the propertise for metallic bonding?
1) conductors-deloc electrons, 2) mealiable-no bonds holiding ions so can slide 3) higher melting point with more delocalised electrons
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Explain ionic bonding
electrons transferred, from positive and negative ions, electrostatic attraction,
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What are the propertise of an ionic compound?
1) high m point, 2)conduct electricty molten/dissolved as ions move so carry charge, 3) soluble- polar H2O molecules pull ions away from lattice
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What is a covalent bond?
share electrons to have full outer shells
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What are the properties of graphite?
1) conducts as delocalised 4th electron of each C, 2) sheets van der waals-slide=pencils 3) high m point strong covalent bonds 4) insoluble
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Whats a molecule? how is it different from a compound?
the smallest parts of a compound that holds the chemical and physical propertise. formed by 2 or more atoms bonded togehter, compound=only 2+ different elements
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Explain the propertise of a simple molecular compound
1)dont conduct as no free electrons, 2)low m point-weak intermolecular forces, 3) solubility depends on how polarised the molecule is
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whats the difference between intramolecular and intermolecular forces?
intra= forces that hold atoms together in molecule e.g covalent. inter=forces between molecules
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Name another macromolecular and its properties
diamond 1) tetrhedral crystal structure- C bonded to 4C's, 2)thermal conductor as vibrations travel easily, 3)high m point-strong colvalent 4) cant conduct as no free electrons
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What is a dative colalent bond?
one atom provides both shared electrons- the one with a lone pair e.g NH3 with H+, both electrons come from lone pair on N
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Other cards in this set
Card 2
Front
What are the propertise for metallic bonding?
Back
1) conductors-deloc electrons, 2) mealiable-no bonds holiding ions so can slide 3) higher melting point with more delocalised electrons
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