Chemistry end of topic year 8 0.0 / 5 ? ChemistryCombustion, atomic mass, mendeleev’s table, metals, the periodic table, reactivityOtherNone Created by: ZarainCreated on: 13-11-19 15:46 Why are alloys stronger than metals? Alloys are made in a way that make it so the atoms inside of it are harder to slide. 1 of 27 What is oxidation? When something reacts with oxygen. 2 of 27 Do groups in the periodic table go down or across? Down. 3 of 27 Do periods in the periodic table go down or across? Across. 4 of 27 How did Mendeleev order his periodic table? By atomic mass. 5 of 27 When do you use electrolysis? When the reactivity of the thing you are extracting is higher than carbon. 6 of 27 How does burning fossil fuels give energy? Energy is stored inside fossil fuels and when burnt, it releases it. 7 of 27 What is a trend? A trend is a pattern of changes which shows an increase or decrease. 8 of 27 What is the name for the elements in group 1? Alkali Metals. 9 of 27 What is the name of elements in group 0? Noble Gases. 10 of 27 What is the name of elements in group 7? Halogens. 11 of 27 What is the name of the elements in the middle of the periodic table? Transition Metals. 12 of 27 What is global warming? Global warming where greenhouse gases are packing up in the earths atmosphere, therefore trapping the heat in the atmosphere. 13 of 27 What are physical trends? Physical trends are mainly the change of state and other changes with are physical. 14 of 27 What are chemical trends? Chemical trends are when they are changes to a substance chemically. 15 of 27 Do alkali metals react with water and oxygen vigorously? Yes. 16 of 27 What are halogens? Halogens are non-metallic substances that form acidic compounds by hydrogen and can be used to make salts. 17 of 27 What is a catalyst? Catalysts are substances that can speed up reactions. 18 of 27 Do catalysts produce CO2? No. 19 of 27 Do catalysts produce hydrogens? Yes. 20 of 27 Do acids produce hydrogen in a reaction? Yes. 21 of 27 What is the name of the test that tests for hydrogen? The squeaky pop test. 22 of 27 Is a cation a metal or non-metal? Metal. 23 of 27 Is an anion a metal or non-metal? Non-metal. 24 of 27 Are catalysts permanently changed when used to speed up reactions? No. 25 of 27 What do you do to extract metals when their reactivity is lower than carbon? You use a more reactive metals to displace the metal in the ore. This is called Displacement. 26 of 27 Do noble gases react a lot? Only a couple noble gases react. 27 of 27
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