KS3 Unit 8f – Compounds and mixtures

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Compounds and Mixtures

KS3 Unit 8f – Compounds and mixtures

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Q1. What is the smallest particle of an element

called?

KS3 Unit 8f – Compounds and mixtures

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A1. An atom

KS3 Unit 8f – Compounds and mixtures

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Q2. What contains only one type of atom and is found on the periodic

table?

KS3 Unit 8f – Compounds and mixtures

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A2. An element

KS3 Unit 8f – Compounds and mixtures

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Q3. What contains two or more elements

chemically combined?

KS3 Unit 8f – Compounds and mixtures

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A3. A compound

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Q4. What contains two or more chemicals

together which are not chemically combined?

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A4. A mixture

KS3 Unit 8f – Compounds and mixtures

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Q5. Give a word that means containing only

one substance.

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A5. Pure

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Q6. What chemicals have a pH less than 7 and turn blue litmus

paper red?

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A6. Acids

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Q7. What type of acid that is found in the

stomach?

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A7. Hydrochloric acid

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Q8. Name a reactive alkali metal that is used in yellow street lights.

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A8. Sodium

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Q9. Which type of reaction is very difficult

to take in the other direction?

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A9. An irreversible reaction

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Q10. What word means to change state from

liquid to gas?

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A10. Boil

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Q11. What word means to change state from

liquid to solid?

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A11. Freeze

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Q12. What word means to change state from

solid to liquid?

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A12. Melt

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Q13. What word means to change state from gas

to liquid?

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A13. Condense

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Q14. What is a measure of the average thermal

energy per molecule in a substance?

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A14. Temperature

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Q15. What do we call a chemical that contains a

metal, carbon and oxygen only?

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A15. A carbonate

KS3 Unit 8f – Compounds and mixtures

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