Atomic Theory

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Across
  1. 2. used to measure Electronegativity
  2. 3. liquid that releases positively charged hydrogen ions
  3. 4. equal to atomic number
  4. 6. a bunch of atoms that are stuck (bonded) together
  5. 10. when a single compound breaks down into 2 or more simpler products.
  6. 14. Two or more substances combine to produce a sing new substance
  7. 16. a material’s ability to conduct electricity
  8. 17. produce toxic,coloured vapours
  9. 18. full outer shells, non-reactive.
  10. 20. Symbol e–
  11. 21. chemicals that change colour when added to an acid or a base
Down
  1. 1. reaction that occurs when an acid is added to a base
  2. 3. shiny and soft metals
  3. 4. cannot be broken down into another substance
  4. 5. product of sodium and chloride
  5. 7. number of protons in an atom
  6. 8. an exothermic chemical reaction that requires oxygen and a fuel substance as reactants and an ignition source to trigger the reaction.
  7. 9. substance that accepts hydrogen ions in a reaction
  8. 11. occurs when the nucleus loses (or gains) a neutron
  9. 12. Symbol n0
  10. 13. atomic number 13
  11. 15. Symbol p+
  12. 19. discoverer of protons and the nucleus
  13. 22. smallest building blocks of living and non-living things