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| A one-or two-letter abbreviation for an element |
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| A horizontal row of elements in the periodic table |
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| Element in the same vertical column of the periodic table:also called family |
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| A drawing of image of an actual thing |
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| The average mass of all the isotopes of an element |
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| An arrangement of the elects showing the repeating pattern of their properties |
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| chemistry and physics, an element is a substance that cannot be broken down into simpler components by any non-nuclear chemical reaction. An element is uniquely determined by the number of protons in the nuclei of its atoms. |
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| a feature or quality belonging typically to a person, place, or thing and serving to identify them |
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| Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907) |
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