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unit 5
notes
14
Chemistry
10th Grade
12/15/2008

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Term
chemical bond
Definition
the force that holds atoms together
Term
chemical bond
Definition
form atractions between a positive nucleus and negative electrons or between a positeve ion and negative ion "opposite attract"
Term
ionization energy
Definition
how easily an atom loses electrons
Term
electron affinity
Definition
how much atraction an atom has for electrons
Term
positive ions
Definition
forms when atoms lose electrons
Term
oxidation number
Definition
the positive or negative charge of anion
Term
ionic bond
Definition
bond formed by transfering electrons from a metal to a nonmetal
Term
covalent bond
Definition
bond formed by sharing electrons
Term
octet rule
Definition
an auter shell of eight valence electrons is most desirabley stable.
electrons gained/lost or shared in the process.
lowest energy configuration.
(example:sodium(Na))
Term
polyatomic ions
Definition
-charged groups of covalently bonded atom.
-bonds ionically ot oppositely charged ions
Term
polar covalent bond
Definition
electrons are unequally shared.
the molecule has an area of positive charge and a area of negative charge.
not symetrical
Term
nonpolar charge/covalent bonds
Definition
electrons are = shared and their is no charge.
symetrical
Term
magnetic charge and oxidation #
Definition
the # of electrons to gain or lose to equal 8
Term
no super script=no charge
Definition
+ or - =1
examples(Ba+2)(Cl-
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