CONCEPTS OF CHMEICAL BONDING

CONCEPTS OF CHMEICAL BONDING - CONCEPTS OF CHMEICAL BONDING...

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CONCEPTS OF CHMEICAL BONDING Chemical Bonds 1. Ionic a. Electrostaci attraction between ions of opposite charge b. Transfer e- form one ion to another c. Gains and e- (exothermic) d. Loses an e- (exothermic) e. Usually the f subshell is emptied before the d, which is emptied before s f. BUT in transition metals lose the valence s electrons first then the d subshell 2. Covalent a. Sharing of electrons b. Between nometallic elements 3. Metallic a. Metal is bonded to several atoms Lewis Structure -Chemical symbol for the element plus dot for each valence electrons Octet Rule -atoms tend to gain or lose e- until there are 8 electrons in the valence shell EXCETPTIONS Transition metals can have more than 8 e- Hydrogen only want two valence e- 3 rd row or below can have more than 8 e- Lattice Energy -Energy required to completely separate a mole of solid ionic compound into its gaseous ions -endothermic -increases as the charges on the ions increase and as their radii decrease -smaller ions have larger lattice energy because they are closer together
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CONCEPTS OF CHMEICAL BONDING - CONCEPTS OF CHMEICAL BONDING...

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