c. transferring protons.
d. sharing protons.
9. What type of electron is available to form bonds?
a. valence
b. nucleus
c. ionic
d. covalent
10. What type of ion forms when an atom loses
electrons?
a. neutral
b. positive
c. negative
d. radioactive
11. A solution is a
a. combination of isotopes.
b. chemical reaction.
c. mixture in which the substances are evenly
spread out.
d. mixture in which undissolved substances do not
settle out.
13. If you stir salt into boiling water, you produce a
a. mixture called a suspension.
b. mixture called a solution.
c. solution and suspension.
d. mixture only.
14. When salt is dissolved in water, water is the
a. reactant.
b. solution.
c. solute.
d. solvent.
15. While preparing a cell culture, a scientist places a
colony of bacteria into distilled water and stirs it
up. This mixture of water and living cells would
best be called
a. a solution.
b. a suspension.
c. a buffer.
d. an adhesion.
16. If the pH of stomach acid and of oven cleaner were
measured,
a. both would be below 7.
b. both would be above 7.
c. the pH of stomach acid would be above 7, but
the pH of oven cleaner would be below 7.
d. the pH of stomach acid would be below 7, but
the pH of oven cleaner would be above 7.
17. A map of eastern North America, showing the pH
of rainfall in the various states, indicates that the
pH of rain in New York State varies from 4.22 to
4.40. According to these figures, the most acidic
rainfall in New York State has a pH of
a. 4.22.
b. 4.30.
c. 4.35.
d. 4.40.
18. A substance with a pH of 6 is called
a. an acid.
b. a base.
c. water.
d. a suspension.
19. Solutions that have more OH– than H+ ions are