Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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The
modern periodic table is organized according to atomic mass.
_________________________
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2.
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The
horizontal rows in the periodic table are known as groups.
_________________________
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3.
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The
elements in a group from the periodic table have similar characteristics.
_________________________
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4.
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The
elements in each period of the periodic table generally have the same number of valence
electrons. _________________________
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5.
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Describing a metal as malleable means that it can be pounded into a new shape.
_________________________
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6.
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The
most chemically reactive metals are in Group 1 of the periodic table.
_________________________
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7.
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Nonmetals can be found on the left side of the periodic table.
_________________________
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8.
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In
general, the physical properties of nonmetals are similar to the properties of metals.
_________________________
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9.
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Fusion is the process in which existing nuclei combine and make new nuclei.
_________________________
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10.
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Atoms
of the halogen family elements typically gain two electrons when they react.
_________________________
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Essay
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11.
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Explain why the atomic mass of an element is usually not given as a whole number even
though each individual atom of the element has a whole number of protons and neutrons.
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12.
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Lithium (atomic number 3), sodium (atomic number 11), and potassium (atomic number 19)
all show similar chemical properties. Explain how this is possible.
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13.
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What
contribution did the Russian chemist Dmitri Mendeleev make to chemistry? What was he able to do to
show the value of his contribution?
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14.
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Metals show a wide range of chemical behavior. Give examples of that variation by
describing some common properties of calcium, gold, iron, and sodium.
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15.
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Compare the properties of metals and nonmetals.
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16.
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Explain why iron and certain other transition metals are used in construction instead
of the alkali metals.
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17.
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How
do elements with smaller nuclei form heavier elements in the stars? Why does this process occur
naturally in stars but not on Earth?
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18.
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Group
17 is called the halogen family, and the group to its right is called the noble gases. How are these
elements alike and how are they different?
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