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Elements, Compounds, and Mixtures

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Term
Definition
acid   substance with a pH lower than 7.  
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atom   the smallest particle of an element that still retains the properties of the element.  
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base   substance with a pH above 7.  
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compound   atoms of more than one type of element that are chemically bonded together.  
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element   substance that is made of only one type of atom.  
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heterogeneous mixture   a mixture which is not mixed evenly and each component retains its own properties.  
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homogeneous mixture   solid, liquid, or gas that contains two or more substances blended evenly throughout.  
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mixture   a combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties; can be gases, solids, liquids, or any combination of them.  
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pH   a measure of the concentration of hydronium ions in a solution using a scale ranging from 0 to 14, with 0 being the most acidic and 14 being the most basic.  
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pure substance   substances that are made of only one type of atom or only one type of molecule (a group of atoms bonded together).  
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salt   compound formed when negative ions from an acid combine with positive ions from a base.  
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solute   in a solution, the substance being dissolved.  
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solution   a mixture which is evenly mixed throughout; also known as a homogeneous mixture.  
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solvent   in a solution, the substance in which the solute is dissolved.  
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suspension   heterogeneous mixture containing a liquid in which visible particles settle throughout.  
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