Chemistry

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Across
  1. 2. conductors of heat and electricity, malleable, ductile
  2. 7. two elements mixed together to create a new substance
  3. 9. the shells of an atom
  4. 10. metal, nonmetal, and metalloid _____
  5. 11. the letters that represent the element name
  6. 13. a cold reaction
  7. 16. row(s) of periodic table
  8. 17. a hot or heated reaction
  9. 19. not conductive, malleable, or ductile
  10. 20. share properties of metals and nonmetals
  11. 21. number of electrons in outer shell
  12. 23. all elements that go into reactions come out of the reaction with the same number
Down
  1. 1. pure substance on the periodic table
  2. 3. number of protons and electrons
  3. 4. a full outer shell, far right side of periodic table
  4. 5. creator of the periodic table
  5. 6. carries a positive charge
  6. 8. negative charge and found in all atoms
  7. 12. a group of atoms
  8. 14. carries negative charge
  9. 15. located below the symbol on the periodic table, add up protons and electrons
  10. 16. the outcome of a chemical reaction
  11. 18. the start of a chemical reaction, what creates a product
  12. 22. even smaller than a molecule
  13. 24. the center of all molecules