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unit 5 flash cards
cards
12
Chemistry
11th Grade
12/15/2008

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Term
chemical bond-salinas
Definition
the force that holds two atoms together, when they form attach between a positive nucleus and negative electrons or between a positive and negative ion.
Term
covalent bond-salinas
Definition
bond formed by sharing electrons between two nonmetals.
Term
electron affinity-salinas
Definition
how much attraction an atom has for elctrons.
Term
octet rule-salinas
Definition
an outer shell of eight valence electrons is most desirable/stable, lowest energy configuration.
Term
oxidation number-salinas
Definition
superscript behind the element: the number of electrons to gain or lose to equal 8.
Term
ionic compounds-salinas
Definition
attravtion between positive ions or cation and negative ions or anion, electrons transfer from metals to nonmetals.
Term
formula for ionic compound-salinas
Definition
write symbol for negative ion first followed by negative ion, assign subscripts to assure compound is electrically neutral.
Term
polyatomic ions-salinas
Definition
charged group of covalently bonded atoms.
Term
nonpolar covalent bonds-salinas
Definition
electrons are equally shared and there is no charge, symmetrical.
Term
polar covalent bonds-salinas
Definition
electrons are unequally shared , not symmetrical.
Term
compounds-salinas
Definition
a chemical combination of two or more different elements in a fixd ratio.
Term
properties of ionic compounds-salinas
Definition
solids at room temperature, nonconductive as solids.
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