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27 Cards in this Set
- Front
- Back
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In developing his periodic table, Mendeleev listed on cards each elements name, atomic mass and
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Properties
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Mendeleev's periodic table did not always list elements in order of increasing atomic mass because he grouped together elements with similar
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Properties
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Mendeleev predicted that the gaps in his periodic table represented
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Undiscovered elements
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The person whose work led to a periodic table based on increasing atomic number was
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Mosley
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An electron that is found in the outermost shell of an atom and determines the atoms chemical properties is called a(n)
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Valence electron
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Elements in the s- or p- blocks of the periodic table are called
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Main group elements
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Elements in group 18 have
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Very low reactivity
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Nonmetallic elements in group 17 that react with metals to form salts are
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Halogens
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The out shell of an electron config of an alkaline earth metal has
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2 electrons in the s orbital
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The alkali metals are found on Earth on in compounds because they
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Are very reactive elements
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A metal is expected to be a(n)
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Conductor
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An element found in group 3-12 of the periodic table is classified as a(n)
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Transitional metal
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Ionization energy is the energy required to remove ______ from an atom of an element
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One electron
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Across a periodic table, ionization energy generally
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Increases
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The change in ionization energy down a group is due to
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Increase electronic shielding
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Across a periodic table, atomic radii generally
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Increase
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An element with the lowest electronegativity would be found in ______ of the periodic table
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Group 1 period 7
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Ninety- three elements occur in nature; the other known elements have been
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Synthesized
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Mendeleev attempted to organize the chemical elements based on their
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Properties
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A horizontal row on the periodic table is called a(n)
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Period
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An element with the general electron configuration for its outmost electron of ns2np1 would be in which element group?
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Group 13
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How many electrons does carbon have in its outermost shell?
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4
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Which of the following elements behaves similarly to calcium?
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Magnesium
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Which periodic group or series of elements is not correctly matched with is common family name?
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Transition metals
Group 3 |
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The energy required to remove am electron for its atom is called the atoms
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Ionization energy
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A measure of the ability of an atom in a chemical compound to attract electrons is called
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Electronegativity
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Many elements have been synthesized by chemist in laboratories. These elements are the
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Transuranium metals
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