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28 Cards in this Set

  • Front
  • Back
octet rule
atoms will lose , gain or share electrons to acheive a noble gas configuration of 8 electrons
lone pairs
pairs of valence electrons that r not involved in covalent bond formation
lewis structure
a representation of covalent bonding in which shared electron pairs are shown as dots or dashes
polar bond
bond where the electrons are shared but not shared equally
covalent bonds
bonds that occur between atoms that share electrons
ionic bonds
bonds that occur b/w a metal n a nonmetal and involve ions
the electrons r not shared but rather transferred
pure covalent bond
bond w/ neutral atoms held together by eqully shared electrons
polar covalent bond
bond thats partially charged atoms r held together by unequally shared electrons
the ability of an atom to draw shared electrons (the elctrons in a cov. bond) to itself
dipole moment
a quantitative measure of the polarity of a bond
1. find unique central atom n make bonds surrounding it with other atoms
2. count total # of valence e-'s
3. for each bond subtract 2 frm total #
4. now fill in rest to there octet remember h only needs 2
5.if any now remain put in pairs off central atom
6. if central atom has less than 8 move however many pairs frm other atoms to make multiple bonds
6 steps to lewis structure
formal charge
charge determined by comparing the number of electrons asslciated w/ the isolated atom or in o/ words the valence electrons
resonance structures
one of 2 or more lewis structures for the same molecule that cant b repped accurately by one lewis structure
free radicals
molecules w/ an odd # of electrons
a homogenous mixture of 2 or more substances
a substance in a solution that is present in the largest amount
the dissolved substance in a soluti0n
a substance that dissolves in water to yield a solution that conducts electricity
a substance taht dissolves in water to yield a solution but does not conduct electricity
process in which an ionic compound breaks apart into its constituant ions
process in which a molecular compound fprms ions after it dissolves
a compound that dissolves in wateer to produce hydroxide ions (OH-)
strong electrolyte
electrolyte that dissociates completely ex. all water soluble ionic compounds
weak electrolytes
compound that produces ions upon dissolving but exists in solution predominantlyy as molecules that r not ionized ex. most acids
an insoluble solid that separates frm a solution
precipitation reaction
chem reaction where a precipitate is formed
process where an ionic substance dissolves in water n the water molecules remove individual ions frm the 3 d solid structure n surround them
the max amt. of solute that will dissolve in a given quantity of solvent at a specific temp