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| Anything that occupies space and has mass. |
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| A pure substance that cannot be broken down into any other substances. |
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| Substance containing two or more elements chemically combined. |
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| Smallest possible particle of an elment that still has the same properties. |
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| Positively charged particle within an atom. |
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| Negatively charged particle within an atom. |
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| These are present in the outer level of the electron cloud and are used in forming bonds. |
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| The location of the electrons. This is found around the nucleus of the atom. |
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| Found in the nucleus of the atom, this particle has no charge. |
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| This is the location of the protons and neutrons. |
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| Atoms that have a different number of neutrons. These unstable atoms release radiation when they break apart. These are often used in medicines. |
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| This is formed when electrons are transferred between elements. |
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| This is formed when two or more elements share electrons. |
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| The compounds used to start a reaction. |
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| The compounds formed by a reaction. |
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| The process in which compounds rearrange their elements to form new compounds. |
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| A set of atoms that do not share their electrons equally, causing a slight charge. |
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| A bond formed between two molecules. |
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| The process of what sticking to itself. |
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| The process of water sticking to another substance. |
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| A mixture in which a solid dissolves in a liquid. |
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| The solid that will dissolve in a liquid. |
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| The liquid used to dissolve a solid. |
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| A mixture made from a solid being dissolved in water. |
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| A substance that has a pH below 7. |
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| A substance that has a pH above 7. |
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| This measures the amount of Hydrogen present in a solution. This is used to measure how acidic or basic something may be. |
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| A substance that limits the change in the acidity of a compound when more acid or base is added. |
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