Shell Filling January 18, 2019 GSCI 163 Spring 2010

Bonding Ionic Bonds Core charge assumes that non valence electrons shield part of the nuclear charge. Our model neglects inner electrons because they don’t contribute to the chemistry Consider two atoms, one Na and on Cl. Neutral Na has a positive core and 1 valence electron. Neutral Cl has 7+ core with 7 valence electrons. These features are illustrated on the left using the Lewis dot structure. Moving one electron complete from Na to Cl leaves two ions. Na+ Cation Cl- Anion The ideal ionic bond has on atom incorporating the electron completely into its structure thereby creating two ions. The atoms are held together as a molecule by the attraction of the charge (+ to -). January 18, 2019 GSCI 163 Spring 2010

Covalent Bonds Core charge assumes that non valence electrons shield part of the nuclear charge. Our model neglects inner electrons because they don’t contribute to the chemistry Consider two identicla atoms, Cl. Neutral Cl has 7+ core with 7 valence electrons. These features are illustrated on the left using the Lewis dot structure. Sharing an electrons, one from each atom fills the shells. January 18, 2019 GSCI 163 Spring 2010

Metallic Bonds Metal atoms form a lattice Different crystal structures possible. Electrons can be thought of as a gas bound to the lattice and not any individual atom. January 18, 2019 GSCI 163 Spring 2010

http://www.explorelearning.com User | Password As752 | sea959 As845 | arm139 As159 | wind596 As841 | wind557 As387 | egg731 As253 | bag343 As642 | sun933 As155 | pen443 Worksheet on phystu Phystu\Courses\GSCI163_giovanettiSP10\GizActW3.doc January 18, 2019 GSCI 163 Spring 2010

material Electron configuration Bonding Ionic Covalent Metallic Hydrogen (next) Apply Lewis diagram to get chemical formulas (at least a good guess- some formulas are exceptions to rules) January 18, 2019 GSCI 163 Spring 2010