Chemistry Reveiw

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Across
  1. 2. made of atoms, simplest substances
  2. 3. neutral charge
  3. 4. thin layer of gold, silver, or other metals around an object
  4. 6. a substance that takes part in change during a reaction
  5. 7. the principle that matter can't be created or destroyed
  6. 12. absorbs energy
  7. 14. Russian chemist, created periodic table
  8. 18. number of protons in the nucleus
  9. 20. located in far right group of elements
  10. 22. what makes up elements
  11. 23. circles around nucleus
  12. 24. conductors of electricity
Down
  1. 1. row (horizontal)
  2. 2. gives off energy
  3. 4. positive charge
  4. 5. positively charged center
  5. 8. short representation of an element
  6. 9. outermost electron(s)
  7. 10. recombination of atoms
  8. 11. weight of element
  9. 13. substance formed when 2 or more elements chemically bond
  10. 15. nonmetallic element, has some properties of a metal
  11. 16. an element not having the character of a metal
  12. 17. negative charge
  13. 19. smallest particle in a chemical element
  14. 21. column (vertical)