AQA GCSE Chemistry - C5 Already Rated A+

AQA GCSE Chemistry - C5 Already Rated A+ 1. What is a list of elements ordered by their reactivity? Answer: The reactivity series is a list of elements in order of their reactivity. 2. What type of reaction occurs when a more reactive element replaces a less reactive one? Answer: Displacement reactions occur when a more reactive element displaces a less reactive one. 3. Which two non-metals are present in the reactivity series? Answer: Carbon and hydrogen are the two non-metals present in the reactivity series. 4. What happens when a metal reacts with oxygen? Answer: When a metal reacts with oxygen, it forms a metal oxide. 5. What happens when a metal reacts with water? Answer: When a metal reacts with water, it produces a metal hydroxide and hydrogen. 6. What is an example of a displacement reaction? Answer: A displacement reaction is where a more reactive metal displaces a less reactive one. 7. What is oxidation, and what does it involve? Answer: Oxidation is the process where an atom loses electrons. It involves the loss of electrons. 8. What is reduction, and what does it involve? Answer: Reduction is the process where an atom gains electrons. It involves the gain of electrons. 9. What is a redox reaction, and what does it involve? Answer: A redox reaction is a reaction where one reactant is oxidized, and another reactant is reduced. It involves the transfer of electrons between atoms. 10. What type of equation shows charges of reactants and products? Answer: An ionic equation shows the charges of reactants and products. 11. In what form do unreactive metals naturally occur inside the earth? Answer: Unreactive metals naturally occur inside the earth in the form of nuggets or flakes. 12. In what form do more reactive metals occur in the earth? Answer: More reactive metals occur in the earth as minerals and ores. 13. What substance is commonly used to separate metals from their ores using redox reactions? Answer: Carbon is commonly used to separate metals from their ores using redox reactions. 14. When does rock with metal minerals become an ore? Answer: Rock with metal minerals becomes an ore when the percentage of minerals is high enough to be commercially viable. 15. What is a half-equation, and what does it show? Answer: A half-equation is an equation that shows a reactant gaining or losing electrons. 16. What is a salt, and what are its properties? Answer: A salt is an ionic compound consisting of a metal and part of an acid. It has properties such