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| A characteristic of a substance that can be observed without changing the substance into something else. |
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| A characteristic that is observed when a substance interacts with another substance. |
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| A substance that cannot be broken down into any other substances by chemical or physical means. |
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| The set of letters used to identify an element. |
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| A substance made of two or more elements chemically combined in a set ratio. |
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| A combination of symbols that shows the ratio of elements in a compound. |
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Two or more substances that are mixed together in the same place but are not chemically combined. |
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| A change that alters the form or appearance of a substance but does not make the material into another substance. |
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| A change in matter that produces new substances. |
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| A short, easy way to show a chemical reaction using symbols instead of words. |
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| A substance that enters into a chemical reaction. |
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| A substance formed as a result of a chemical reaction. |
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Definition
| The smallest unit of an element. |
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| A combination of two or more atoms that are bonded together. |
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| The force that holds two atoms together. |
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| An arrangement of the elements in order of atomic number in which elements with similar physical and chemical properties are grouped in columns. |
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| The average mass of one atom of an element. |
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Definition
| The number of protons in the nucleus of an element's atoms. |
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| Elements in the same vertical column of the periodic table; also called a family. |
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| A horizontal row of elements in the periodic table. |
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Definition
| A term used to describe material that can be pounded or rolled into shape. |
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| A term used to describe a material that can be drawn out into a long wire. |
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| A substance through which electrons move freely, transmitting heat or electricity. |
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| A physical property of those metals that are attracted to magnets and can be made into magnets. |
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