chemistry lab

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Across
  1. 2. Metals group 1 in the periodic table, not including hydrogen
  2. 4. group 17 in the periodic table of elements
  3. 6. slow chemical change that occurs when oxygen in air reacts with metals
  4. 9. Number number of protons in the nucleus of one atom of an element
  5. 10. pure substance made up of only one type atom
  6. 11. anything that has mass and occupies space
  7. 13. an atom that has become electrically charged
  8. 15. vertical column of elements in the periodic table
  9. 17. substance that helps a chemical reaction to proceed more quickly
  10. 18. Gases group 18 in the periodic table
  11. 19. chemical combination of two or more elements in a specific ratio
  12. 21. amount of mass in a given volume of a substance
  13. 23. positively charged center of an atom
Down
  1. 1. combination of pure substances
  2. 3. Formula combination of symbols that represent a compound
  3. 5. dull, brittle element that does not conduct electricity
  4. 7. change of state from a solid to a liquid
  5. 8. description of a substance that can be rolled or pounded into sheets
  6. 12. change of state from a gas to a solid
  7. 14. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
  8. 16. System an experiment in which all reactants and all products of a chemical reaction are accounted for
  9. 17. Change a change in where 2 or more substances react to create a new substance with completely different properties
  10. 20. description of a solid that can be stretched into a long wire
  11. 22. Solution a solution in which water is the solvent