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