GCSE Chemisty AQA Unit 2 Test Additional Unit 2 Chemistry AQA Higher Tier 4.5 / 5 based on 6 ratings ? ChemistryTesting and analysing substancesGCSEAll boards Created by: UmaCreated on: 13-12-10 19:54 How many electrons can fit in each shell? 2, 8, 8, 12 1 of 17 Atoms in the periodic table are arranged in order of...? Increasing atomic number 2 of 17 What does the atomic number represent? The number of protons 3 of 17 A covalent bond is....? A bond between two non-metal atoms 4 of 17 Graphie, diamond and silicon dioxide are all...? Giant covalent structures (lattices) 5 of 17 What makes metals conduct electricity? They have delocalised electrons 6 of 17 Ionic compounds are conductive when...? Molten and liquid 7 of 17 What is a property of a simple covalent structure? Low boiling points 8 of 17 What is the relative formula mass of water? (H2O) 16+1+1=18 9 of 17 What can graphite be used for? Pencil lead 10 of 17 What is an isotope? Atoms of an element with different numbers of neutrons 11 of 17 Atom economy is...? Relative mass of useful products divided by relative mass of total products 12 of 17 What can you find in the middle of the atom? Protons and Neutrons 13 of 17 What are ions? A positive or negative atom 14 of 17 Noble gases do not react with anything because...? Their outer shells are complete 15 of 17 Ionic bonds form when...? Metals lose electrons, Non-metals gain electrons 16 of 17 What is the name for the forces between the ions in ionic bonding? Electrostatic forces 17 of 17
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