True/False
Indicate whether the sentence or statement is true
or false.
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1.
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The
types of particles that are located in the nucleus of an atom are protons and neutrons, and the types
of particles that are located in the energy levels surrounding the nucleus are
electrons.
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2.
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The
atomic number of carbon is 6, so it must contain 12 electrons.
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3.
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Most
elements are stable if their outermost energy level contains an even number of
electrons.
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4.
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Atoms
in a gas move more rapidly than atoms in a liquid or a solid do.
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5.
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The
products of an endergonic chemical reaction possess more energy than the reactants from which they
are produced.
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6.
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The
amount of energy needed to cause a chemical reaction to start is called activation
energy.
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7.
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When
an enzyme binds with its substrate, the activation energy needed for the chemical reaction to occur
is raised.
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8.
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Enzymes speed up a chemical reaction by increasing the activation energy of the
reaction.
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9.
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Without enzymes, chemical reactions necessary for life would not occur at a rate
sufficient to sustain life.
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10.
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Free
hydrogen ions can react with water molecules and form a positively charged ion, the hydronium
ion.
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11.
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Bases
tend to have a sour taste, while acids tend to have a bitter taste.
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12.
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Buffers can neutralize acids, but they do not affect bases.
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