Pure Substances: Elements and Compounds. Mixtures: Homogenous and Heterogenous.

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Last updated 8:05 PM on 9/26/26
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8 Terms

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Element

A material made of only *one type of atom*. Found on the periodic table. Examples: He, Na, O₂, O₃, F₂, S₈

<p>A material made of only *one type of atom*. Found on the periodic table. Examples: He, Na, O₂, O₃, F₂, S₈</p>
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Compound

a material which is made of two or more different kind of atoms that are chemically combined (or bonded). Examples H₂O, CO₂, C₆H₁₂O₆

<p>a material which is made of two or more different kind of atoms that are chemically combined (or bonded). Examples H₂O, CO₂, C₆H₁₂O₆</p>
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Molecule

Two or more atoms bonded together. Can be elements like O₂ or compounds like H₂O.

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Pure substance

a material in which all of the particles are identical (the same). Only one type of element OR one type of compound is present. Examples: pure water, pure helium, pure copper, etc.

<p>a material in which all of the particles are identical (the same). Only one type of element OR one type of compound is present. Examples: pure water, pure helium, pure copper, etc.</p>
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Mixture

Two or more substances that are mixed but not chemically combined. More than one type of materials is present. Each substance in a mixture keeps its properties. Mixtures can usually be easily separated.

<p>Two or more substances that are mixed but not chemically combined. More than one type of materials is present. Each substance in a mixture keeps its properties. Mixtures can usually be easily separated.</p>
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Homogenous Mixture

A mixture where the substances appear the same throughout.

<p>A mixture where the substances appear the same throughout.</p>
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Heterogenous Mixture

A mixture where the substances that make up the mixture are mixed in differently throughout.

<p>A mixture where the substances that make up the mixture are mixed in differently throughout.</p>
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Atom

The basic building block of all things. Different kinds of atoms are called elements.

<p>The basic building block of all things. Different kinds of atoms are called elements.</p>