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16 Cards in this Set
- Front
- Back
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Periodic law
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When elements are arranged by increasing atomic number, properties tend to repeat.
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Edwin m mcmillan
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Discovered the first synthetic element (neptunium).
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Linus pauling
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Used mathematical formulas to determine relative scale for electronegativity.
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Henry moseley
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British physicist who determined the atomic numbers for elements and then arranged the elements by increasing atomic numbers in the periodic table.
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William ramsey
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Discovered the noble gases.
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Dmitri mendeleev
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Russian chemist who publoshed the first periodic table, which arranged the elements by increasing atomic mass.
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John newlands
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English chemist who discovered the law of octaves.
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Law of octaves
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The properties of the elements repeat after every 8th element.
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Stannislao cannizzaro & J.S. Stas
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Developed an accurate method to determine relative atomic mass for any element.
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J.W. Döbereiner
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German chemist who grouped same elements into triads.
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Triad
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Set of three elements with similar properties.
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Lanthanides
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Period 6.
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Actinides
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Period 7.
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Atomic radius
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Half the distance between two nuclei of the same atom.
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Ionization energy
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The energy needed to remove an electron from an atom.
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Electronegativity
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The ability of an atom to attract electrons to itself when bonded to another atom.
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