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| How the modern periodic chart is organized. Indicates the number of protons in an atom |
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| The horizontal rows in the periodic table. Elements in a row of the periodic table are the same period. |
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| The elements in a group from the periodic table that have similar characteristics. A column of elements is called a group or family. |
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| Where the most chemically reactive metals are found in the periodic table. |
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| A term used to describe material that can be pounded, hammered, or rolled into a new shape. |
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| Created the first periodic table by arranging elements in order of increasing atomic mass. He predicted that three new elements would be discovered, and he described their properties twenty years before they were. |
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| The elements have similar properties |
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| Most are not liquid at room temperature. Most metals are solids. Metals show a wide range of chemical properties. Most elements are metals. |
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| Located to the right of the zigzag line on the periodic table. At room temperature, more than half of the nonmetal elements are gases EX: Carbon. Nonmetals are poor conductors of electricity. |
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| A group of elements that share characteristics with both metals and nonmetals. Sometimes they will conduct electricity, sometimes they won't. Some are metallic, some are not. |
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| Located in the part of the element farthest from the nucleus. |
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| The part of the atom that moves around the nucleus. |
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| Elements that transmit electricity and heat easily. |
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| Elements on the right side of the Periodic Chart that form molecules of two or more atoms each. |
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| Given to each element. It usually consists of one or two letters. |
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| A substance that will conduct electricity only under certain conditions. |
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| They touch the zigzag line |
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| Located in the first row of Group 1. It is separated from the rest of group 1 because it is a gas and a non-metal. |
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