Bonding, structure and properties

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  • Created by: J.E.C.
  • Created on: 24-04-14 09:32
The type of particles a solid substance contains determines some of the properties, explain why?
May contain atoms, ions or molecules. Could determine whether it conducts electricty because an ionic substance for example would conduct when molten or dissolved. Also if a substance contains ions or polar molecules it may dissolve in water
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The way the particles are bonded together also affects properties, explain how?
Could be ionic, covalent, metallic or weak IM bonds. The stronger the bonds the higher the mp and bp and the harder the substance.
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The way the particles are arranged relative to each other can also affect poperties, explain why?
Could be arranged in chains or sheets or 3d. This can dtermine flexibility and hardness of a substance.
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Explain why CO2 has low melting and boiling points and is a gas at room temperature?
There are strong covalent bonds between the C and O atoms, but only weak IM bonds between individual molecules, which are therefore easy to separate.
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Diamond and graphite have ___ ___ structures whereas the fullerenes are ___?
Covalent network, molecular
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Ionic bonding involves compounds of ___ and ___, on example is ___, the strong ionic bonds are attractions between ___ __ __. These substances have __ mp and bp and are ___ but brittle. They conduct when...? Often __ in water but ___ in solvents?
Metals with non-metals, Sodium Chloride. Oppositely charged ions, high, hard. Molten or dissolved in water. Soluble, insoluble.
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Give 3 examples of covalent network structures? This structure is made up of ___ where there is an attraction of...? Comment on the bp/mp, hardness and electrical conductivity? Covalent network structures are ___ in water and solvents?
Diamond, graphite, silica. Atoms - atom's nuclei for shared electrons. Very high, very hard, do not normally conduct. Insoluble.
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For metallic structures, the attraction is of..? Comment on the bp/mp, hardness and electrical conductivity? Metallic structures are ___ in water and solvents?
Atom's nuclei for delocalised electrons. Generally high, hard but malleable, conduct when solid or liquid. Insoluble.
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Simple molecular structures involve...? Give 3 examples? These particles are bonded together by...? Comment on the bp/mp, hardness and electrical conductivity? Simple molecular structures are ___ in water and __ solvents?
Non-metal elements (and) non-metal compounds. CO2, Cl2, H2O. Weak IM bonds between molecules and strong covalent bonds between the atoms within molecules. Low, soft, do not conduct. Usually insoluble, usually soluble.
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Macromolecular structures are often __ __ molecules such as ___ with weak IM bonds between __ and strong covalent bonds between the ___? Comment on the bp/mp, hardness and electrical conductivity? structures are ___ in water and ___ solvents?
Long-chain, DNA, molecules, atoms..Moderate, variable, do not usually conduct. Usually insoluble, sometimes soluble.
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Other cards in this set

Card 2

Front

The way the particles are bonded together also affects properties, explain how?

Back

Could be ionic, covalent, metallic or weak IM bonds. The stronger the bonds the higher the mp and bp and the harder the substance.

Card 3

Front

The way the particles are arranged relative to each other can also affect poperties, explain why?

Back

Preview of the front of card 3

Card 4

Front

Explain why CO2 has low melting and boiling points and is a gas at room temperature?

Back

Preview of the front of card 4

Card 5

Front

Diamond and graphite have ___ ___ structures whereas the fullerenes are ___?

Back

Preview of the front of card 5
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