OCR SALTERS CHEMISTRY B: Bonding, Structure and Properties 4.0 / 5 based on 1 rating ? ChemistryBonding & shapesA2/A-levelOCR Created by: LucySPGCreated on: 08-01-14 19:57 What substances have an ionic structure? Compounds of metals with non-metals such as sodium chloride and calcium oxide 1 of 40 What substances have a covalent network structure? Some elements in Group 4 and some of their compounds such as diamond, graphite and silica 2 of 40 What substances have a metallic structure? Metals such as sodium, copper and iron 3 of 40 What substances have a simple molecular structure? Some non-metal elements and some non-metal/non-metal compounds such as carbon dioxide, chlorine and water 4 of 40 What substances have macromolecular structures? Polymers such as polyethene, nylon, proteins and DNA 5 of 40 What type of particles do ionic structures have? Ions 6 of 40 What type of particles do covalent network structures have? Atoms 7 of 40 What type of particles do metallic structures contain? Positive ions surrounded by delocalised electrons 8 of 40 What type of particles do simple molecule structures have? Small molecules 9 of 40 What type of particles do macromolecular structures have? Long-chain molecules 10 of 40 How are the particles bonded together in ionic structures? Strong, ionic bonds; attraction between oppositely charged ions 11 of 40 How are the particles bonded together in covalent network structures? Strong, covalent bonds; attraction of atoms' nuclei for shared electrons 12 of 40 How are the particles bonded together in metallic structures? Strong, metallic bonding; attraction of atoms' nuclei for delocalised electrons 13 of 40 How are the particles bonded together in simple molecular structures? Weak intermolecular bonds between molecules; strong covalent bonds between the atoms with molecules 14 of 40 How are the particles bonded together in macromolecular structures? Weak intermolecular bonds between molecules; strong covalent bonds between the atoms within molecules 15 of 40 What are the melting and boiling points for ionic structures? High 16 of 40 What are the melting and boiling points for covalent network structures? Very high 17 of 40 What are the melting and boiling points for metallic structures? Generally high (except mercury) 18 of 40 What are the melting and boiling points for simple molecule structures? Low 19 of 40 What are the melting and boiling points for macromolecular structures? Moderate - often decompose on heating 20 of 40 What is the hardness of ionic structures? Hard but brittle 21 of 40 What is the hardness of covalent network structures? Very hard (if three dimensional) 22 of 40 What is the hardness of metallic structures? Hard but malleable (except mercury) 23 of 40 What is the hardness of simple molecular structures? Soft 24 of 40 What is the hardness of macromolecular structures? Variable; many are soft but often flexible 25 of 40 What is the electrical conductivity like of ionic structures? Electrolytes - conduct when molten or dissolved in water 26 of 40 What is the electrical conductivity like of covalent network structures? Do not normally conduct (except graphite) 27 of 40 What is the electrical conductivity like of metallic structures? Conduct when solid or liquid 28 of 40 What is the electrical conductivity like of simple molecular structures? Do not conduct 29 of 40 What is the electrical conductivity like of macromolecular structures? Do not normally conduct 30 of 40 Are ionic structures soluble in water? Often soluble 31 of 40 Are covalent network structures soluble in water? Insoluble 32 of 40 Are metallic structures soluble in water? Insoluble (but some react) 33 of 40 Are simple molecular structures soluble in water? Usually insoluble, unless molecules contain groups which can hydrogen bond with water 34 of 40 Are macromolecular structures soluble in water? Usually insoluble 35 of 40 Are ionic structures soluble in non-polar solvents? Insoluble 36 of 40 Are covalent network structures soluble in non-polar solvents? Insoluble 37 of 40 Are metallic network structures soluble in non-polar solvents? Insoluble 38 of 40 Are simple molecular structures soluble in non-polar solvents? Usually soluble 39 of 40 Are macromolecular structures soluble in non-polar solvents? Sometimes soluble 40 of 40
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