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19 Cards in this Set
- Front
- Back
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Periodic Law |
law that states that the repeating chemical and physical properties of elements change periodically with the atomic number of the elements |
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Valence Electrons |
electron that is found in the outermost shell of an atom and that determines the atom’s chemical properties |
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Group |
vertical column of elements in the periodic table |
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Period |
horizontal row of elements on the periodic table |
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Main Group Elements |
an element in the s block or p block of the periodic table |
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Alkali Metals |
one of the elements of group 1 of the periodic table |
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Alkaline-Earth Metals |
one of the elements in group 2 of the periodic table |
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Halogens |
one of the elements of group 17 |
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Noble Gas |
an unreactive element of group 18 on the periodic table |
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Transition Metal |
one of the metals that can use the inner shell before using the outer shell to bond |
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Lanthanide |
member of the rare-earth series of elements, whose atomic numbers range from 58-71 |
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Actinide |
any element of the actinide series, atomic numbers from 89-103 |
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Alloy |
solid or liquid mixture of 2 or more metals |
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Ionization Energy |
the energy required to move an electron from an atom or an ion |
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Electron Shielding |
the reduction of the attractive force between a positively charged nucleus and its outermost electrons due to the cancellation of some of the positive charge by the negative charges of the inner electrons |
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Bond Radius |
half the distance from center to center of two like atoms that are bonded together |
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Electronegativity |
a measure of the ability of an atom in a chemical compound to attract electrons |
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Nuclear Reaction |
a reaction that affects the nucleus of an atom |
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Superheavy Element |
an element whose atomic number is greater than 106
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