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9 Cards in this Set
- Front
- Back
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Why would a covalent network crystal make better jewelry than an ionic network crystal?
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Covalent crystals are the strongest solids and generally never melt. For example Diamonds would be better than salt
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What is the most significant difference between a metallic crystal and a molecular crystal?
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Metallic crystals are good conductors of electricity and have low melting points
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List and explain the four intermolecular forces. Use one or two paragraphs
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1)Interionic forces-forces between ionic bonds 2)Hydrogen Bonds-very strong and stable force between H N O F. 3)Dipole- forces between polar atoms;weaker than H-bonds or Inter ionic forces 4) Dispersion-non polar forces;larger molecules have stronger forces
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Explain 2 distinctive properties of water and why those properties are necessary for life on this planet?
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Water as a solid is less dense than liquid form. Allows ice to float on surface and fish to swim on bottom. It is also a good stabilizer-regulates the temperature in environment and prevent major extremes in temperature
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What would characterize a liquid with low viscosity?
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Viscosity- based on particles in a solution holding onto each other- Fluid that has small sym particles and they can move past each other nicely-If molecules are larger and irregular in shape
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Would a liquid with small
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symmetric molecules have a high or low viscosity?
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Three traits of heavy metals are caused by the ability of the atoms outermost electrons to be mobile. One trait would be ductility. What are the other two?
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Conductivity and Malleability
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What would be the most important difference between molecular crystals and ionic crystals?
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Ionic are soluble in polar solutions. Also they are solids and have a higher melting point. Molecular compounds are generally liquids and have a lower melting point.
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What would characterize a liquid with low viscosity?
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Low viscosity molecules would be small and symmetrical.
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