Year 9 Science Revision

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Across
  1. 6. The lightest element on the Periodic Table
  2. 8. Sub-atomic particle found in the nucleus of at atom
  3. 9. Sub-atomic particle found outside the nucleus of an atom
  4. 11. Element with 6 protons in its nucleus
  5. 13. The outer shell of electrons is called the ? shell
  6. 15. The number of electrons the first shell can hold
  7. 16. Element with 3 protons in its nucleus
  8. 20. A substance which releases hydrogen ions into solution
  9. 21. Atoms that have the same number of protons, but have different numbers of neutrons
  10. 22. Element with 8 protons in its nucleus
Down
  1. 1. An example of an acid (found in your stomach)
  2. 2. A substance which releases hydroxide ions into solution
  3. 3. An atom who has lost an electron
  4. 4. Number of protons = ? Number
  5. 5. True or False? The Periodic Table was arranged by the chemical and physical properties of elements
  6. 7. Bonding that occurs when atoms share valence electrons
  7. 10. Elements in period 1 have ? number of valence electrons
  8. 12. A positive sub atomic particle found in the nucleus
  9. 14. A substance which changes colour in the presence of an acid/base
  10. 17. Bonding that occurs between a metal and a non-metal
  11. 18. Total number of protons and neutrons in the nucleus is the ? number
  12. 19. A charged atom who has gained or lost an electron