CHEM_WEEK_7 CHEM 1013 - 006
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This 2 page Class Notes was uploaded by ying.fan Notetaker on Sunday October 11, 2015. The Class Notes belongs to CHEM 1013 - 006 at Arkansas State University taught by William A. BurnsE-mail in Fall 2015. Since its upload, it has received 17 views. For similar materials see GENERAL CHEMISTRY I in Chemistry at Arkansas State University.
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Date Created: 10/11/15
Attractive force that holds atoms or ion together in a compound Involes valence electrons Often abbreviated as a quotlinequot joining the bounded atoms Sharing of eletrons between atoms Molecular compounds polyatomic ions Transfer of eletrons from one species to another result in ions lonic Compounds Bond LenothdistancelThe averageequilibriumdistance between the two nuclei Involved In the bond unitsangstrom nanometer or picometer Bond Energy The amount of energy required to break one molelof bonds In the gas phase and produce atmes In the gas phase Bound length and energy vary depending on the elements partICIpatIng In the chemical bond A methid used to keep track of va ence e ec rons Consists of atomic symbol surrounded by dots each dot represents a valence electron lonic BondTransfer of electrons from one species to another F kq1q2rquot2 Octet RluleWhen atoms from ionic bonds thev tend to losegain suf cnent electrons so as to attaIn a lled valence shell isoelectronic with nearest noble gas Lattie EnerP he energy required to convert one mole of an IonIc so I to Its cons Ituent Ions In the gas phase Lattice energy is always positiveenergy is required needed to overcome the attractive force between oppOSItely charged Ions The magnitude of lattice energy isla measure of an ionic compound39s Stabllll t39 Incresmg attIce energy corresponds to IncreaSIng stabIlI y of IonIc solId Covalent BondSharing of electrons between atoms Lar ecprobability of nding electrons of bond between the bon e atoms High electron density between atoms octet rulewhen atoms from covalent bonds they tend to share suf CIent electrons so as to attaIn a lled valence shell IsoelectronIc WIth nearest noble gas H lled valence shell contains 2 electronslike He All other representative elements lled valence shell contaIns electrons Covalent Bond multiple BondsCovalently bonded atoms share paIrs of electrons The Bounding ContinuumUp to this point a bond has been descrIbed as eIther lonictransfer of electrons Covaentequal sharing of electrons between bonded atoms betweent two extremesthe polar covalent bond
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