Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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The
smallest particle into which an element can be divided and still be the same substance is called
a(n) a. | nucleus. | c. | atom. | b. | electron. | d. | neutron. | | | | |
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2.
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What
particle did J. J. Thomson discover? a. | neutron | c. | atom | b. | electron | d. | proton | | | | |
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3.
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How
would you describe the nucleus? a. | dense, positively charged | c. | tiny, negatively charged | b. | large,
positively charged | d. | dense,
negatively charged | | | | |
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4.
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Where
are electrons likely to be found? a. | the nucleus | c. | mixed throughout an atom | b. | electron
clouds | d. | paths, or energy
levels | | | | |
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5.
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Dalton believed that a. | atoms of the same element are exactly
alike. | b. | most substances are made of atoms. | c. | atoms of
different elements are the same. | d. | atoms can be divided. | | |
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6.
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What
did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common? |