Chemistry Study Crossword

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Across
  1. 1. a group of atoms bonded together
  2. 4. column of elements
  3. 7. outside reaction
  4. 8. the basic unit of a chemical element
  5. 10. outer part of the atom
  6. 12. composed of two or more seperate elements
  7. 14. negitive electron
  8. 16. conseculed reaction
  9. 17. a Russian chemist
  10. 20. forms positive irons
  11. 21. xenon, neon, krypton, radion
  12. 22. positive electron
Down
  1. 2. from one form to another
  2. 3. the number of protons in a nucleus of an atom
  3. 5. rings around the nucleus
  4. 6. what was made after the reactions
  5. 8. the mass of an atom
  6. 9. thin coat of gold or silver or other metals
  7. 11. a part or aspect of something abstract
  8. 13. neutral electron
  9. 15. abbreviation of element
  10. 18. a substance that takes part in charge
  11. 19. located to the right of metalliods and to the left of halogen
  12. 22. in each of these the atomic number increases