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| Smallest particle of a substance that retains the properties of that substance |
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| Protons, neutrons, and electrons |
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| Positively charged center of the atom, contains protons and neutrons |
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| Area around the nucleus, probable location of electrons |
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| Atom that has gained or lost electrons |
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| Metals, nonmetals, metalloids, synthetic |
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| Shorthand way to write the element's name |
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| Number of protons in the nucleus of an atom |
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| Mass of one atom of an element, equal to the protons plus neutrons for that element |
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| Atoms of the same element that have different numbers of neutrons |
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| Located to the left of the stair step line, good conductors of heat and electricity, shiny, malleable, and ductile |
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| Located to the right of the stair step line, do not conduct heat or electricity, brittle |
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| Located on either side of the stair step line, have properties of metals and nonmetals, used as semiconductors |
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| Columns of the periodic table, share similar properties |
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| Rows on the periodic table |
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| Group 1 on the periodic table, very reactive and not found in nature in pure form |
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| Group 2 on the periodic table, very reactive and not found in nature in pure form |
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| Groups 3 - 12 on the periodic table |
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| Group 17 on the periodic table, form salts with group 1 elements |
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| Group 18 on the periodic table, unreactive and not found in compounds |
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| A metal combined with a nonmetal, electrons are transferred from one element to another |
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| A nonmetal combined with another nonmetal, electrons are shared |
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| A metal combined with another metal |
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| Can be hammered into a thin sheet |
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| Can be drawn into a thin wire |
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