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| the smallest unit of an element |
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| 2 or more atoms bonded together through a chemical reaction |
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| a substance made of more than 1 type of molecule/atom. Each type of molecule/atom keeps its original properties. Mixtures can be separated based on physical properties ex:m&ms can be separated by color |
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| a substance formed by a chemical reaction between 2 or more different atoms/molecules. Physical properties often change when a chemical reaction occurs. (compounds must be separated by a chemical reaction-not physically) |
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| a different mixture: one where the particles are NOT evenly distributed/dispersed |
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| same mixture: one where the particles ARE evenly distributed/dispersed |
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| the thing that is being dissolved (the salt in saltwater) |
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| The liquid something that is being dissolved (the water in saltwater) |
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| homogeneous mixture of a solid and a liquid. Where the solid does not settle out. Normally see through ex: saltwater |
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| heterogeneous mixture where the solute settels out over time ex: chocolate milk b/c you need to shake it |
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| a hetero/homogeneous mixture where the particles do NOT settle out over time, but are normally quite large. NOT see through |
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H=acid OH=base
ex: KOH= a base
ex: HCI= an acid |
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to tell wether a compound is ionic or covalent, do the following
1. check if there is any type of metal in the compound
2. If so, it is ionic
3. Covalent bonds do NOT involve metal!!! |
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0 7 14
7=neutral
0-6= acids (a sour taste)
8-14= bases (a bitter taste) |
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| In a covalent bond the electrons are shared evenly between the two elements |
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| In an Ionic bond the electrons are stollen by one of the elements and the elements are bonded b/c of the attraction between + and - |
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| when these ionic bonds are placed in water, they split apart resulting in a poistive or negative ion |
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| they split apart and become either + or - ions |
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Ions in water change the acidity of the water. If H+ Ions are released from the compound then the water becomes more acid(y)
If OH- ions are released from the compound, your water becomes basic (a.k.a. alkaline) |
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