Chemistry Basics

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Across
  1. 2. Principle ingredient in old thermometers
  2. 4. Product of cellular respiration
  3. 5. Process for purifying a liquid (such as water)
  4. 7. Number of valence electrons for Lithium, or any other alkali metal in group 1
  5. 10. Currently, there are 118 ______ on the periodic table
  6. 11. 78% of the earth's atmosphere
  7. 14. Color, melting point, smell, or density
  8. 15. study of how matter is made and how it changes Chemistry
  9. 16. The formation of bubbles, or a release of gas, is a potential indication that this has occurred Chemical reaction
  10. 18. Something that has mass and takes up space
  11. 20. Method for separating salt from water
  12. 21. Equal to the weighted average of an element's isotopes
  13. 23. Method for separating solids from water
  14. 24. Charged atoms
  15. 25. Dihydrogen Monoxide
Down
  1. 1. What an element's atomic number represents
  2. 3. pH, flammability, reactivity, or combustion
  3. 4. Carbon monoxide (or perhaps the state of Colorado)
  4. 6. The periodic table has 18 groups and 7 _____
  5. 8. Mass divided by volume
  6. 9. Law stating that matter is neither created nor destroyed
  7. 12. 6.02 x 1023 atoms
  8. 13. Combination of two or more substances
  9. 17. Potent greenhouse gas
  10. 19. Famous atomic model named after a Danish scientist
  11. 22. Food for plants