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10 Cards in this Set
- Front
- Back
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What must the difference in electronegativity be in order for something to be a pure covalent substance?
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Less than 0.4.
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What must the difference in electronegativity be in an ionic substance?
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Greater than 1.7.
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What must the difference in electronegativity be in a polar covalent substance?
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Between 0.4 and 1.7.
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Nitrate.
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NO3 (- charge)
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Nitrite.
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NO2 (- charge)
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What type of hybridisation does a diamond have?
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sp3.
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What are allotropes?
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Different molecular or crystalline structures of an element.
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What are the three allotropes of carbon?
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Graphite, Diamond and Fullerene.
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What is the conductivity of graphite?
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High. Its hybridization is sp2, so only 3 electrons used in bonding, and the forth electron is found in a delocalized pi cloud.
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What is the conductivity of diamond?
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None. All electrons are used in localized bonds.
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