Chemistry Unit Crossword

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Across
  1. 1. the item that sparks a chemical reaction
  2. 3. the base of a chemical reaction
  3. 6. group of atoms
  4. 7. the mass of an atom
  5. 8. energy absorbed
  6. 9. mix of two or more elements
  7. 10. a type of matter
  8. 11. number of protons and electrons in an atom
  9. 12. gases on right edge of periodic table
  10. 15. electrons in outermost orbital
  11. 18. positive charge in atom
  12. 20. path of electrons around nucleus
  13. 21. no charge in atom
  14. 22. coating one substance with another
  15. 24. element that's solid, shiny, and conducts electricity
Down
  1. 2. negative charge in atom
  2. 4. Russian chemist
  3. 5. law concerning the change of mass
  4. 11. smallest particle in the universe
  5. 13. letters used to represent an atom
  6. 14. a mix between metal and nonmetal
  7. 16. energy released
  8. 17. element without met properties
  9. 19. center of an atom
  10. 22. a place on the periodic table
  11. 23. section of elements on periodic table