biology vocab

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Across
  1. 2. -basic unit of matter
  2. 4. -electrons are shared between atoms
  3. 8. -the attraction between molecules of the same substance
  4. 9. -is a homogeneous mixture
  5. 12. -a pure substance consisting of all the same types of atom.
  6. 13. -when electrons are gained or lost ____ are formed
  7. 15. -the parts of the mixture are very evenly mixed (milk,blood,etc.)
  8. 16. -any compound that forms OH- ion concentration than pure water
  9. 18. -an attraction between molecules of different substances
  10. 19. -cells that prevent sharp,sudden changes in pH
Down
  1. 1. -electrons are shared unequally resulting in a a molecule which has roles.
  2. 3. -the electrons are shared equally
  3. 4. -the chemical combination of two or more elements in definite proportion
  4. 5. -the parts of the mixture are unevenly mixed (oil + water, chicken noodle soup)
  5. 6. - transferred from one atom to another
  6. 7. -a mixture of water and undissolved materials
  7. 10. -the substance that does the dissolving (water)
  8. 11. -two or more elements or compounds that are physically mixed together but not chemically combined (trail mix)
  9. 14. -the substance that gets dissolved (salt)
  10. 17. -any compound that forms H+ ions in a solution