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| A particle made of two or more atoms bonded together. |
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| A small positively charged particle in the nucleus of the atom. |
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| A small particle in the nucleus of the atom, with no electrical charge. |
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| A tiny negatively charged particle that moves around the nucleus of an atom. |
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| A pure substance made of two or more elements chemically combined. |
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| A change in which one or more substances combine or break apart to form new substances. |
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| The basic particle from which all elements are made. |
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| A pure substance that cannot be broken down into other substances by chemical or physical means. |
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| Two or more substances that are mixed together but not chemically combined. |
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| A natural acid found in citrus fruits |
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| A single kind of matter that is pure and has a specific set of properties. |
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The scientific name for a chemical
Ex. Sodium chloride |
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Regularly used name for a chemical
Ex. Salt |
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A formula that gives the elements in a compound and the ratio of atoms
Ex. NaCl |
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| The number written beneath each chemical element |
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| Anything that has mass and occupies space |
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