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22 Cards in this Set
- Front
- Back
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Periodic function/Periodic Law
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Repitition of chemical and physical properties based on electron configuration.
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Demetri Mendeleev and his invention
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The periodic table of elements
*arranged in order of atomic mass and chemical/physical properties |
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Metals and Nonmetals electron configuration
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3 or less valence electrons (metals)
More than 3 valence electrons (nonmetals) |
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Family =
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Similar physical and chemical properties
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Henry Mosely
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based his periodic table on atomic number - true today
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The 3 periodic trends
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1) Atomic Radius
2) Ionization energy 3) Diatomic elements |
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Atomic radius as you go down the table..
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increase, because the number of energy levels increases
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Atomic radius will ____ as you move from left to right
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decrease, because of an increase in nuclear charge
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Ionization Energy is..
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The energy required to move a valence electron
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Ions -
Metals form: Nonmetals form: |
cations or positive ions
anions or negative ions |
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Metals have a ...
Nonmetals have a ... |
low IE
High IE (gain electorns) |
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From left to right Ionization energy
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increases
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From top to bottom
Ionization energy |
decreases
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Diatomic elements
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distance between nuclei
Hydrogen, Chlorine, Fluorine, Bromine, Oxygen, Nitrogen, Iodine |
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Factors affecting Ionization Energy
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1) Atomic Radius
2) Sheilding effect 3) Nuclear Charge 4) Half filled or filled sublevel |
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Metal Ions or cations are ____ than the original atom
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Smaller, because lost energy level and the net nuclear charge has increased
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Non metal ions or anions are _____ than the original atom
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larger, because the net nuclear charge is reduced and electron repulsion causes the electron cloud to expand
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Anions and Cations ______ as you move from left to right
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decrease, nuclear charge increase
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Electonegativity
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the ability of an atom to attract electon when bonded to another atom
Increase from left to right, decrease going down |
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Metals..
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shiny (luster)
good conductor (electricity and heat) ductile (pulled into wire) malleable (hammered into shape) |
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nonmetals..
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dull
poor conductor brittle |
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Oxidation Number
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number assigned to an atom or group of atoms that designate the charge of the species
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