Completion
Complete each statement.
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1.
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Sound is not made of matter because it has no ____________________.
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2.
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A substance that is made of atoms of more than one type chemically bound together is called a(n) ____________________.
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3.
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Every chemical compound is unique and different from the ____________________ it contains.
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4.
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One molecule of hydrochloric acid (HCl) contains ____________________ atom(s).
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5.
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When two or more pure substances are blended together, the result is a(n) ____________________.
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6.
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A ____________________ property describes how a substance acts when it reacts with other substances.
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7.
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For any pure substance, the boiling point and melting point will always remain ____________________.
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8.
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The density of ____________________ is 1.00 g/cm3.
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9.
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Flammability is a chemical property that tells whether a substance reacts in the presence of ____________________.
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10.
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We inhale oxygen and exhale carbon dioxide as a result of a ____________________ change in our bodies.
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11.
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A physical change differs from a chemical change in that ______________________________ are formed.
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12.
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Copper is used to make electric wire because it is a good ____________________.
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13.
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A molecule is the smallest unit of a substance that retains the ____________________ of that substance.
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14.
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The chemical symbol O stands for the element ____________________.
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15.
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The chemical formula for a chlorine molecule, which contains two chlorine (Cl) atoms, is ____________________.
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16.
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Two or more liquids that can dissolve into each other are referred to as ____________________.
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17.
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Tooth fillings are often made of gold or porcelain because those materials are not ____________________.
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18.
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Ice floats in water because it is ____________________ than water.
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19.
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Wheat ground into flour is an example of a(n) ____________________ change.
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20.
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Aluminum, oxygen, and carbon are each ____________________.
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21.
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Grinding quartz crystals down to produce sand causes a(n) ____________________ change.
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22.
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The smallest particle of oxygen that behaves like oxygen is an oxygen ____________________.
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23.
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Each molecule of iron oxide (Fe2O3) contains ____________________ iron atom(s).
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24.
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A mixture of flour and water is called a(n) _________________________ mixture because the substances do not dissolve.
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25.
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The ____________________ of a substance is defined as its mass divided by its volume.
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26.
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A chemical change is a change in the ____________________ of a substance.
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27.
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A change in color during a reaction is often a sign that a(n) ____________________ change has occurred.
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28.
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The components of a(n) ____________________ can be separated because they are not chemically combined.
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29.
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Gold is usually found in a pure form in nature because it is not ____________________.
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