!Chemistry Crossword!

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Across
  1. 2. makes up electron cloud
  2. 4. is potassium stable or reactive
  3. 8. center of atom
  4. 10. shown by light, gas, color, temp, or
  5. 13. # of atoms
  6. 15. she is always neutral, who is she?
  7. 18. what does the atomic number represent
  8. 19. atomic mass= 51.996
Down
  1. 1. what do the periods represent on lesft side of table
  2. 2. surrounds nucleus
  3. 3. what do groups/families represent on top of table
  4. 5. atomic numer 5
  5. 6. # of molecules
  6. 7. She is always negative, she is smaller than the others who is she
  7. 9. He
  8. 11. defines element
  9. 12. how many valance electrons does helium have
  10. 14. What has 40 protons and neutrons combined
  11. 16. 3 energy levels 1 valance electron
  12. 17. H2O