CHEM 141 Study Guide - Electronegativity, Octet Rule
6 Sep 2013
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Atoms are made up of protons, neutrons, & electrons (e-: e- are transferable, can add/remove/share. Cooperative experience by sharing e- (an attraction between 2 atoms causing them to share electrons) The # of vacancies in the valance shell (refer to the periodic table) 2 pairs of e- being shared, both atoms contributes 2 e- (oxygen is double bonded with carbon) An atom"s ability to polarize a bond, an electronegative atom pulls atoms toward itself. Atoms want to have a full octet (8 e-) Fully empty or completely filled valance shell. 6 bonds would break the octet rule. If an atom can form 3 bonds, it can: Form 3 separate single bonds to different atoms. 1 single and 1 double bond to different atoms. Constitutional isomers: molecular formula is the most rudimentary definition of a molecule, only tells what atoms are in the compound. Doesn"t show how e- are bonding the atoms together.
