chemistry 0.0 / 5 ? ChemistryTesting and analysing substancesGCSEAQA Created by: Lewys ThomsonCreated on: 18-04-16 16:47 What group is an element in if it has 5 electrons in the outer shell? group 5 1 of 11 What is a compound? where two or more atoms are chemically combined. 2 of 11 What 3 things can happen when a chemical reaction occurs with electrons? either given, taken or shared. 3 of 11 what happens if an atom loses an electron? it becomes a positive ion. 4 of 11 what happens if an atom gains an electron? it becomes a negative ion. 5 of 11 What do group 1 metals (alkali metas) react with and what do they form? react with non metals to form an ion with a positive charge. 6 of 11 What do group 7 non metals (halogens) react with and what do they form? react with alkali metals to form an ion ith a negative charge. 7 of 11 What happens when atoms share pairs of electrons? they form strong covalent bonds. 8 of 11 can you name 2 giant covalent structures and their propeties? graphite- conductor, opaque, soft de-localised bonds. diamond-tightly held bonds, insulator, hard, transparrent. 9 of 11 What steucture would you expect in a giant structure of metals? they would be arranged in a regular pattern. 10 of 11 What are the electrons in the highest occupied energy levels in a metal? they are delocalised, therefore they can move freely through the whole structure. 11 of 11
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