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Why do ionic compounds conduct electricity when molten or dissolved? Because the ions are free to move and carry charge. What is covalent bonding? Sharing of electrons between two non-metal atoms. Do covalent compounds conduct electricity? Why? No, because they don't have free charged particles. What is metallic bonding? Positive metal ions surrounded by a sea of delocalized electrons. Why are metals good conductors of electricity? Because the delocalized electrons in...

What color flame test for calcium go? Yellowy red What color flame test for copper go? Blue/ Green. What happens when you react aluminum with sodium hydroxide? White precipitate forms. Which dissolves in excess. What happens when you react calcium with sodium hydroxide? White precipitate forms. What happens when you react magnesium with sodium hydroxide? White precipitate forms. What happens when you react copper (II) with sodium hydroxide? Blue precipita...

Burning fossil fuels releases more CO2 Agriculture farm animals produce methane Creating waste - landfills waste contributes to CO2 build up Climate change consequences ice caps melt animals die weather changes temp changes Carbon footprints measure of the amount of greenhouse gases released by something over its lifetime. Air pollution pollutants: fossil fuels incomplete combustion - soot carbon monoxide release of sulfur dioxide and oxides of nitrogen ...

Electroplating coating (a metal object) by electrolytic deposition with chromium, silver, or another metal. Carat a measure of the purity of gold, pure gold being 24 carats. Steels alloys of iron with carbon and/or other elements Carbon steels the simplest steels, alloys of steel with carbon. Stainless steels chromium-nickel steels that combine hardness and strength with great resistance to corrosion. Thermosoftening polymer polymers that soften when heated and har...

AQA CHEMISTRY Paper 2 Organic and Physical Chemistry

AQA Chemistry Paper 2 Higher Combined Science Predicted Paper 2022 Name ……………………………………………… Date ……………………………………………… 1 hour 15 minutes allowed Similar to your real exam, each question in this gets harder towards the end of each question, so if you find you can’t do the last part of a certain question, try the next question – they all start off easier then get harder. Grade boundaries These are VERY rou...