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20 Cards in this Set
- Front
- Back
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periodic table
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arrangement of the elements in order of their atomic numbers so that elements with similar electron configurations are located in the same column.
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periodic law
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natural law that states that the physical and chemical properties of the elements are periodic functions of their atomic numbers
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nonmetal
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element that has low melting point and a dull surface, breaks easily, is a poor conductor of heat and electricity, and tends to gain electrons in a chemical reaction
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Groupd/Families
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Vertical rows with elements with similar properties
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Periods
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horizontal rows
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alkali metals
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group 1A
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alkaline earth metals
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group 2a
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halogens
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group 7a
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noble gases
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group 8a
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metal
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reconized by lust or shine
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semimetals
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or metalloids may have properties of nonmetals and metals
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valence electrons
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the highest principal energy level are atoms outer most electrons
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the s-block element
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are hydrogen and helium and all the alkali earth metals
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abbreviated electron configuration
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shorthand notation describing the distribution of electrons among the energy levels of an atom
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noble gas inner core
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group of electrons in an atoms inner filled energy levels configured much like electrons in noble gas
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periodic trend
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prperty of the elements that can be predicted from the arrangement of the periodic table
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atomic radius
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distance between the center of the nucleus of an atom and the outermost electrons
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ionization energy
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energy required to remove the most loosely held electron from an atom
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electon affinity
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energy change that occurs when an atom gains an electron
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electronegativity
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property of an element that indicates how strongly a atom of the elemnt attracts electros in a chemical bond
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