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Chapter 5 and 6 - Chemistry


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Periodic function/Periodic Law
Repitition of chemical and physical properties based on electron configuration.
Demetri Mendeleev and his invention
The periodic table of elements
*arranged in order of atomic mass and chemical/physical properties
Metals and Nonmetals electron configuration
3 or less valence electrons (metals)
More than 3 valence electrons
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Similar physical and chemical properties
Henry Mosely
based his periodic table on atomic number - true today
The 3 periodic trends
1) Atomic Radius
2) Ionization energy
3) Diatomic elements
Atomic radius as you go down the table..
increase, because the number of energy levels increases
Atomic radius will ____ as you move from left to right
decrease, because of an increase in nuclear charge
Ionization Energy is..
The energy required to move a valence electron
Ions -
Metals form:
Nonmetals form:
cations or positive ions

anions or negative ions
Metals have a ...
Nonmetals have a ...
low IE
High IE (gain electorns)
From left to right Ionization energy
From top to bottom
Ionization energy
Diatomic elements
distance between nuclei
Hydrogen, Chlorine, Fluorine, Bromine, Oxygen, Nitrogen, Iodine
Factors affecting Ionization Energy
1) Atomic Radius
2) Sheilding effect
3) Nuclear Charge
4) Half filled or filled sublevel
Metal Ions or cations are ____ than the original atom
Smaller, because lost energy level and the net nuclear charge has increased
Non metal ions or anions are _____ than the original atom
larger, because the net nuclear charge is reduced and electron repulsion causes the electron cloud to expand
Anions and Cations ______ as you move from left to right
decrease, nuclear charge increase
the ability of an atom to attract electon when bonded to another atom

Increase from left to right, decrease going down
shiny (luster)
good conductor (electricity and heat)
ductile (pulled into wire)
malleable (hammered into shape)
poor conductor
Oxidation Number
number assigned to an atom or group of atoms that designate the charge of the species

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