Biology II Ch. 2 Mastery Learning Test in Worksheets
Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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An element has an atomic number of 11 and an atomic number weight of 23. The
number of neutrons in each atom is
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2.
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The atom of an alement has one proton and two neutrons. Its atomic number
is
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3.
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The atom of an element has 6 protons and eight neutrons. The number of electrons
in this atom if neutral is
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4.
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The relationship between 12/6 C and 14/6 C is that they are
a. | molecules | c. | isotopes | b. | isomers | d. | polymers |
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5.
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An atom has 11 electrons and 12 neutrons. Its atomic weight is
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6.
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The energy possessed by electrons in the K shell is _________________ than the
energy possessed by electrons in the L shell.
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7.
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An element has an atomic number of 14. Its electron distribution over several
shells is
a. | 1-4-8 | c. | 2-8-2 | b. | 1-8-5 | d. | 2-8-4 |
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8.
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An element has an atomic number of 13. The number of electrons in each
atom’s L energy shell is
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9.
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Select the reactive element by its atomic number.
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10.
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Select the most stable element by its atomic number.
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11.
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Select the compound.
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12.
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The atoms of which element tend to lose electrons in a chemical reaction?
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13.
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In a chemical reaction between calcium and chlorine atoms, chlorine atoms tend
to be
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14.
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Select the incorrect association.
a. | covalent bond - electrons transferred | b. | hydrogen bond - between water
molecules | c. | ionic bond - charged particles formed | d. | polar covalent bond - present in the water
molecule |
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15.
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The atoms of which element tend to be reduced in a chemical reaction?
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16.
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Each is a property of water EXCEPT
a. | easily changed from liquid to gas | c. | maximum density at 4 degrees
celsius | b. | good solvent | d. | molecules are cohesive |
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17.
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Select the correct statement about acids
a. | They cannot be buffered in a solution. | c. | HCl is an
example. | b. | They donate hydroxide ions in solution. | d. | They tend to raise the
pH. |
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18.
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Select the most basic pH of the given hydrogen ion concentrations.
a. | 1 x 10-3 | c. | 1 x 10-9 | b. | 1 x 10-4 | d. | 1 x
10-12 |
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19.
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Select the incorrect statement about bases.
a. | They can be buffered in a solution. | c. | NaOH is an
example. | b. | They furnish hydroxide ions in solution. | d. | They tend to lower the
pH. |
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20.
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Which of the following is an example of a buffer?
a. | carbonic acid | c. | hydroxide ion | b. | hydrogen ions | d. | NaCl |
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21.
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Which element is more reactive?
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22.
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Chemical reactions in the human body produce many acid end products. Yet, the pH
of the blood remains remarkably constant. Why?
a. | the products are only weak acids that cannot cause damage | b. | buffers prevent
drastic swings in pH and keep in normal limits | c. | enzymes destroy the acids before they can
damage cells | d. | the body is mostly water which dilutes the acids |
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