Year 9 Chemistry Key Words Revision

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Across
  1. 3. A nuclear reaction that converts one type of atom into a different type of atom
  2. 7. A small, negatively charged particle
  3. 10. The breakdown of metals due to their reaction with other chemicals
  4. 13. Different forms of an atom that have the same number of protons, but a different number of neutrons
  5. 14. A way of writing down the reactants being used and the products being made in a chemical reaction
  6. 16. A particle with no electric charge found in the nucleus of an atom
  7. 17. A positively charged particle found in the nucleus of an atom
  8. 18. An atom that has gained electrons to become negatively charged
  9. 20. A chemical reaction that absorbs energy
  10. 22. An atom that has lost electrons to become positively charged
  11. 23. A particle made up of 2 protons and 2 neutrons that can be released during nuclear decay
  12. 24. OH-, released by bases
  13. 26. A base that dissolves in water
  14. 27. A small, negatively particle that can be released during nuclear decay
  15. 28. Something that emits radiation
  16. 29. When a nucleus undergoes a reaction and emits radiation
Down
  1. 1. H+, released by acids
  2. 2. A substance that releases hydrogen ions into an aqueous solution
  3. 4. The arrangement of electrons in shells around the nucleus
  4. 5. The particles that atoms are made of
  5. 6. The green chemical found in plants that traps sunlight for photosynthesis
  6. 7. A chemical reaction that releases energy
  7. 8. A cluster of protons and neutrons found in the centre of an atom
  8. 9. A nuclear reaction in which a large nucleus is split into smaller nuclei
  9. 11. A substance that releases hydroxide ions
  10. 12. Endothermic reaction which occurs in plants using energy from the sun to produce glucose
  11. 15. A nuclear reaction in which small nuclei come together to form a large nucleus
  12. 19. A process that causes a nucleus to change
  13. 21. The reaction of an acid with a base, forming salt and water
  14. 25. A very high-energy electromagnetic wave produced when protons and neutrons rearrange