Lewis Diagrams (sports update canucks over the oilers 4-3)

Electron Structure

-Drawing Electron Dot Diagrams

- The nucleus is represented by the atomic symbol.

-For individual elements determining the number of valence electrons

-Electrons are represented by dots around the symbol

-4 orbitals ( one of each side of the nucleus each holding a max of 2e-

-each orbital get 1e- before they pair up




http://www.green-planet-solar-energy.com/images/carbon-hydrogen-e-dots.gif




Lewis Diagrams for Compounds and Ions

-In a covalent compounds electrons are shared

1)Determine the number of valence e- for each atom in the molecule

2)Place atoms so that valence e- are shared to fill each orbital




http://www.walkingrandomly.com/images/chemistry/lewis-ethane.gif




Double and Triple Bonds

-Sometimes the only way covalent compound can fill all their valence levels is if they share more than on electron




http://www.fordhamprep.org/gcurran/sho/sho/images/lewdot11.jpg




Ionic Compounds

-In ionic compounds electrons transfer from one element to another

-Draw [] around the metal and non-metal

-Write the changes on the outside brackets




http://www.kentchemistry.com/images/links/binding2/covale9.gif




Lewis Diagrams for Polyatomic Ions

1) Determine the number of valence e- for each atom in the molecule

2)Subtract on electron for each + valence electron charge

3)Add one electron for each - valence electron charge



http://www.glencove.k12.ny.us/highschool/ChemRev/CovBond.jpg