GCSE AQA Chemistry 2 GCSE AQA Chemistry 2 3.5 / 5 based on 3 ratings ? ScienceChemistryGCSE Created by: nellieCreated on: 30-12-10 14:51 What is Nanotechnology and it's uses? 1 of 18 Nano structure and thier very small sizes gives them new properties. Large surface areas, exposing many atoms at thier surface. Electrons can move through them easily. used to make new drugs, sensors, catalysts. 2 of 18 What is percentage Yield? 3 of 18 Percentage Yield = Amount of product collected/ Maximum amount of product possible then times the answer by 100 to make it a percentage 4 of 18 Talk about metallic Bonds........ 5 of 18 Held together by delocalised electrons which circles the metal ions only metal elements can have metallic bonds 6 of 18 Talk about covalent bonds...... 7 of 18 Only between Non-metal. They share electrons 8 of 18 How do you work out the number of protons, neutrons and electrons? 9 of 18 Number of neutrons = Mass number(biggest) - atomic number(Small) 10 of 18 what are simple molecules...... 11 of 18 Molecules that are held together by strong covalent bonds. Attraction between molecules are called intermolecular forces. attraction between simple molecules are weak. 12 of 18 What are the stages of Harber Process? 13 of 18 Held together by delocalised electrons which circles the metal ions only metal elements can have metallic bonds 14 of 18 how do you work out the atom economy? 15 of 18 atom economy= relative formula mass of useful products Relative formula mass of all products 16 of 18 Talk about ionic bonds....... 17 of 18 Only between metal and nnon-metal Electostatic forces attract the positive will lose electron and the negative will gain electron. Melted- conduct electricity water splits the lattice structure 18 of 18
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