7th Grade Science Crossword

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Across
  1. 4. first person to discover atoms
  2. 5. the changes when an element is put together or pulled apart
  3. 6. a substance that is made up of only one kind of a atom
  4. 8. states that in a chemical reaction,matter is neither created nor destroyed
  5. 9. the vertical column
  6. 10. the substance you end with
  7. 11. alters the form of a substance
  8. 14. not cuttable
  9. 15. the horizontal row are called periods are labeled
  10. 16. negative charge in the nucleus
  11. 18. neutral in the nucleus
  12. 19. center of an atom
Down
  1. 1. a characteristics that enables a substance to undergo a chemical change
  2. 2. the substance you start out with
  3. 3. smallest unit of a element
  4. 7. two or more types of elements chemically combined
  5. 11. positive charge in the nucleus
  6. 12. the number of protons & neutrons found in the nucleus
  7. 13. chemical reaction also involves energy
  8. 17. when more then one atom chemically combined