Electronic Structure

Drawing Electron Dot Diagrams

• The nucleus is represented by the atomic symbol
• For individual elements determine the number of valence electrons.
• Elements are represented by dots around the symbol
• Four orbitals(one of each side of the nucleus) each holdng a maximum of 2 e-

• Each orbital gets 1 e- before they power it up

Lewis Diagrams for Compounds and Ions

• in covalent compounds electrons are shared
• determine the number of valence e- for each atom in the molecule.
• place atoms so that the e- are shared to fill each orbital

 Double & Triple Bonds

• somtimes the only covalent compounds can fill at their valence levels is if they share more than 1 electron.

Ionic Compounds

• In ionic compounds electrons transfer from one element to another
• determine the number of valence e- on the cation. Move these to the anion.
• Draw the [ ] around the metal and non-metal.
• write the charges outside the brackets.