Bonding, Structure and the Properties of matter 2 0.0 / 5 ? BiologyBonding, Structure and the Properties of matter 2GCSEAQA Created by: holly.preston12345Created on: 30-01-19 11:33 Properties of small molecules Properties of small molecules Properties of small molecul 1 of 25 Substances that consist of small molecules are usually... gases or liquids 2 of 25 What type of bonds do small molecules have? Covalent bonds in the molecule are strong but forces between molecules (intermolecular) are weak 3 of 25 Give 1 property of a small molecule: Low melting and boiling points- due to having weak intermolecular forces that easily broken 4 of 25 Give 1 property of a small molecule: Do not conduct electricity 5 of 25 Why do small molecules not conduct electricity? Due to them molecules not having an overall electrical charge 6 of 25 Give 1 property of a small molecule: Larger molecules have higher melting and boiling points 7 of 25 Why do larger molecules have higher melting and boiling points? Intermolecular forces increase with the size of the molecules 8 of 25 Structure and bonding of carbon Structure and bonding of carbon 9 of 25 Diamond Diamond 10 of 25 Describe the structure of a diamond: Each carbon atom is bonded to four others 11 of 25 Describe the 1 properties of a diamond: Very hard- rigid structure 12 of 25 Describe the 1 properties of a diamond: Very high melting point- strong covalent bonds 13 of 25 Describe the 1 properties of a diamond: Does not conduct electricity- no delocalized electrons 14 of 25 Graphene Graphene 15 of 25 What is graphene? Single layer of graphite one atom thick 16 of 25 What are the properties of graphene? Excellent conductor- contains delocalised electrons and Very strong- contains strong covalent bonds 17 of 25 Fullerenes Fullerenes 18 of 25 What are fullerenes? Molecules of carbon atom with hollow shapes 19 of 25 What is the structure of fullerenes based on? Hexagonal rings of carbon atoms with hollow shapes. Can also have rings of five (pentagonal) or seven (heptagonal) carbon atoms. 20 of 25 What was the first fullerene to be discovered? Buckminsterfullerene, C60 21 of 25 Carbon nanotubes Carbon nanotubes 22 of 25 Describe a carbon nanotubes: Very thin and long cylindrical fullerenes 23 of 25 Describe 1 properties of a carbon nanotube: Very conductive, , Large surface area to volume ratio and High tensile strength. 24 of 25 What are carbon nanotubes used in? Used in electronics industry and Catalysts and lubricants 25 of 25
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