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...
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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