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5 Cards in this Set
- Front
- Back
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chemical bonds
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* form between atoms w/ un-
filled valence shells |
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covalent bonds
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* share valence e-
EX. H2 and O2: molecules they have definite size and # of molecules * H2O and CH4: compounds * equal sharing of e-: non- polor covalent bonds between atoms of same electronegativity * unequal sharingof e-: polor covlent bond between atoms of different electronegativity Oxygen has a high electro-. * bonding capacity (usually the # of unpaired e- in the valence shell * covalent bonds are strong bonds. |
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Ionic bonds
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weak
* a highly electronegative atom strips e- away from its partner. EX. charged atoms or molecules are ions - charge: anion + charge: cation * ionic bonds: salt lack a definite size and # of atoms EX. MgCl2 * strong in dry enviroments |
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weak chemical bonds
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* ionic bonds in aqueous
enviroment * Hydrogen bonds H that is covalently bonded to more electro- atoms is attracted to electro- atom of another molecule. * Van der Walls Interaction random movement of e- (s) providing asymmetry in e- distribution = area of charge |
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molecular shape and function
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* shape is determined by position of atoms orbitals
* molecular shape dictates function |
