Year 10 Chemistry

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Across
  1. 1. Numeric scale expressing acidity or alkalinity of a solution.
  2. 2. Strong acid commonly used in industry, known for producing sulphate salts when reacting with metals.
  3. 4. Acid that only partially ionises in water.
  4. 7. Substance that changes colour in response to pH.
  5. 11. CH₄
  6. 12. Soluble base producing OH⁻ in aqueous solution
  7. 13. blue litmus turns this colour in acidic solutions.
  8. 15. 3D repeating structure formed by electrostatic attraction between oppositely charged ions.
  9. 16. Transition metal used in specialised alloys, known for having the highest natural element density.
  10. 17. Reactant that is completely consumed first in a chemical reaction, determining the maximum amount of product formed.
  11. 19. The pH of a neutral solution.
  12. 20. Common polyatomic anion, NO₃⁻.
  13. 22. The salt made ammonia reacts with nitric acid.
Down
  1. 1. Hydrogen gas identification.
  2. 3. Gaseous covalent compound that forms hydrochloric acid when dissolved in water.
  3. 5. Gas that is identifiable by its ability to turn limewater milky.
  4. 6. A positively charged polyatomic ion
  5. 8. Describes an ion composed of multiple covalently bonded atoms carrying a net charge.
  6. 9. Whole‑number multiplier used to balance equations.
  7. 10. Acid reacts with base to form salt and water.
  8. 14. Reaction type where one element replaces another in a compound
  9. 18. Species formed when electrons are lost from an atom
  10. 21. Scientist whose constant defines the number of particles in one mole of a substance, approximately 6.02 × 10²³.