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22 Cards in this Set
- Front
- Back
PERIODS/SERIES
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elements organized horizontally in rows
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GROUPS/FAMILIES
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elements organized vertically in columns
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METALS
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a chemical element that is a good conductor of both electricity and heat and forms cations and ionic bonds with non-metals
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NONMETALS
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an element which is dull-colored, brittle and non-conductive
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METALLOIDS
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an element that exhibits properties of both metals and nonmetals
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ALKALI METALS
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the elements of Group 1 of the periodic table; they are soft, silver metals that are very chemically active
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ALKALINE EARTH
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a series of elements comprising Group 2 of the periodic table
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TRANSITION ELEMENTS
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the d block
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INNER TRANSITION/RARE EARTH ELEMENTS
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the f block
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HALOGENS
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the elements of Group 17
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NOBLE GASES
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the elements of Group 18
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REPRESENTATIVE OR MAIN GROUP ELEMENTS
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the s and p blocks, including Helium
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PERIODIC LAW
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states that the physical and chemical properties of the elements are periodic functions of their atomic numbers
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MENDELEEV
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noticed that when the elements were arranged in order of increasing atomic mass, certain similarities in their chemical properties appeared at regular intervals
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MOSELEY
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discovered that the elements fit into patterns better when they were arranged according to atomic number, rather than atomic weight
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ATOMIC RADIUS
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may be defined as one-half the distance between the nuclei of identical atoms that are bonded together
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IONIZATION ENERGY
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the energy required to remove one electron from a neutral atom of an element
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ELECTRON AFFINITY
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the energy change that occurs when an electron is acquired by a neutral atom
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VALENCE ELECTRONS
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The electrons available to be lost, gained, or shared in the formation of chemical compounds
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ELECTRONEGATIVITY
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a measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound
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ANIONS
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negative ions that increase in size a little bit
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CATIONS
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positive ions that decrease in size a little bit
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