Atoms

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Across
  1. 3. Negatively charged
  2. 5. the maximum amount of electrons in the first shell
  3. 6. The lowest level of radioactivity
  4. 11. measurement of the ability for an atom to attract electrons
  5. 12. everything is made up of...
  6. 13. found in the center of an atom
  7. 17. two elements combine to create a compound is called...
  8. 18. neutral charge
Down
  1. 1. there are 118 of these on a table
  2. 2. Where all elements are arranged, invented in 1869
  3. 4. A materials ability to conduct electricity
  4. 7. On the periodic table its symbol is 'H'
  5. 8. An example of combustion
  6. 9. this takes place when a compound is split
  7. 10. positively charged
  8. 14. places on an atom where electrons are
  9. 15. We breath this element
  10. 16. A form of oxidization