Hunting The Elements Crossword

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Across
  1. 1. the symbols of the six most common elements in living things
  2. 5. number of these particles identifies an element
  3. 7. semiconductor element found in glass
  4. 8. center of the atom
  5. 9. lightest element in the universe
  6. 11. about 70% of the elements are classified as
  7. 13. stable elements that do not react with other elements
Down
  1. 2. element found in matches and urine
  2. 3. process of converting hydrogen into helium in stars
  3. 4. the elements located in Group 17 of the periodic table
  4. 6. the name of the elements in the first column of the periodic table
  5. 10. invented the periodic table
  6. 12. a chemical compound made up of sodium and chlorine