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| Any element from group 2; Beryllium, Magnesium, Calcium, Strontium, Barium, Radium. |
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| Any element from group 1; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium. |
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| A measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons. |
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| Hard but liable to break or shatter easily. |
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| Molecules composed only of 2 atoms, of either the same or different chemical elements; Hydrogen, Nitrogen, Oxygen, & Carbon Monoxide. |
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| Lacking brightness, vividness, or sheen. |
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| The measure of the ability of an atom in a bond to attract electrons. |
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| The elements in a vertical column of the periodic table. |
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| Any element from group 17; Fluorine, Chlorine, Bromine, Iodine, Astatine. |
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| The minimal energy required to remove (to infinity) one mole of electrons from one mole of gaseous atoms or molecules isolated in free space & in its ground electronic state. |
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| A gentle sheen or soft glow, especially that of a partly reflective surface. |
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| Property of a metal, meaning it can be pounded or rolled into thin sheets. |
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An element that has luster, conducts heat & electricity, & usually bends without breaking.
~Groups 1-12. |
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| An element with some physical & chemical properties of metals & other properties of non-metals. |
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| An element that does NOT conduct electricity. |
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| A horizontal row on the periodic table. |
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| Showing a response to a stimulus. |
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| Any of the set of metallic elements occupying a central block in the periodic table. Iron, Manganese, Chromium, & Copper. |
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