Chemistry Crossword

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Across
  1. 4. collumns on a periodic table
  2. 5. negative charge
  3. 8. the substances after change are called
  4. 10. where electrons are found (2 words)
  5. 12. the weight of an element(2 words)
  6. 13. the smallest unit of matter
  7. 15. positively charged
  8. 17. the number before a chemical formula
  9. 19. shiny and malleable
Down
  1. 1. electrons in the last shell(2 words)
  2. 2. the small number in a chemical formula
  3. 3. a group of atoms
  4. 6. the substances before change are called
  5. 7. neutrally charged
  6. 8. rows on a periodic table
  7. 9. the formula of an element (2 words)
  8. 11. used to organize elements(2 words
  9. 14. levels in the electron cloud (2 words)
  10. 16. where elements are organized (2 words)
  11. 18. a pure substance that cannot be broken down