Cool Chemistry Crossword

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Across
  1. 2. solid, shiny, good conductor of heat and electricity
  2. 4. (on the P.T) this is what each vertical row on the table is called
  3. 7. mass approximately the number of protons and neutrons in an atom (add these together and you'll find it)
  4. 8. gas all of these gasses have a full outer orbital shell
  5. 10. one of the 118 that make up the Periodic Table
  6. 13. the middle of an atom, powerhouse
  7. 20. doesn't carry a negative charge, but a ____ charge
  8. 21. of Conservation of Mass the mass of products in a chemical reaction must equal the mass of the reactants
  9. 22. electron outermost energy level of an atom
  10. 23. share characteristics of both
  11. 24. the absorption of heat
Down
  1. 1. Mendeleev Russian, discovered the Periodic Law
  2. 3. H2O is an example of this
  3. 5. during a chemical reaction the reactants are formed into these
  4. 6. abbreviation of an element, usually related to the name and typically has only two letters
  5. 9. (on the P.T) this is what each horizontal row on the table is called
  6. 11. the release of heat
  7. 12. brittle not malleable or ductile, poor conductor of heat and electricity
  8. 14. a mixture composed of two or more separate elements
  9. 15. a group of atoms linked together to make a substance
  10. 16. doesn't really carry any sort of charge, it's just ___
  11. 17. a substance that undergoes a change during a chemical reaction
  12. 18. carries a ___ charge (not a positive one)
  13. 19. shell of an atom