Chemistry Unit Review Crossword

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Across
  1. 3. groups of atoms that are bonded
  2. 6. rows of elements on the Periodic Element Table
  3. 9. a law that says that mass can’t be created or destroyed by any chemical reactions
  4. 10. two chemical elements combined
  5. 13. a substance that cannot be broken down into a simpler substance
  6. 14. mass equal to protons and neutrons
  7. 15. heat releasing reaction
  8. 16. shiny, good electricity and heat conductors
  9. 18. dull, poor electricity and heat conductors
  10. 21. positive charge
  11. 22. has positive and neutral charges
  12. 23. electron an atom’s outermost energy level
Down
  1. 1. Gas gaseous elements
  2. 2. letters for every element
  3. 4. heat absorption reaction
  4. 5. neutral charge
  5. 7. undergoes chemical changes to broken chemical bonds to create products
  6. 8. a russian chemist and inventor that created the Periodic Element Table
  7. 11. equal between nonmetals and metals
  8. 12. new materials created by chemical reactions
  9. 15. negative charge
  10. 17. matter building blocks
  11. 19. energy level or shell
  12. 20. columns of elements on the Periodic Element Table