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AQA GCSE Chemistry Unit 1 Higher Verified Guide

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AQA GCSE Chemistry Unit 1 Higher Verified Guide 1. What is the smallest unit of an element that can exist, composed of protons, neutrons, and electrons? Answer: The atom is the smallest unit of an element that can exist. 2. How do elements differ from compounds and mixtures? Answer: Element...

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  • July 11, 2024
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  • 2023/2024
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AQA GCSE Chemistry Unit 1 Higher Verified Guide
1. What is the smallest unit of an element that can exist, composed of protons, neutrons, and electrons?



Answer: The atom is the smallest unit of an element that can exist.



2. How do elements differ from compounds and mixtures?



Answer: Elements are made up of one kind of atom, whereas compounds are formed by combining two
or more elements chemically, and mixtures are a combination of two or more substances that are not
chemically combined.



3. What is the process of separating a solid from a liquid?



Answer: Filtration is the process of separating a solid from a liquid.



4. What is the reaction between Group 1 metals and water?



Answer: Group 1 metals react with water to form metal hydroxides and hydrogen gas.



5. What is the process of forming crystals as a solvent evaporates from a solution?



Answer: Crystallization is the process of forming crystals as a solvent evaporates from a solution.



6. What is the process of separating substances in a solution based on their boiling points?



Answer: Distillation is a process that separates substances in a solution based on their boiling points.



7. What is the technique used to separate substances using solvent and chromatography paper?

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