A short hand method for describing where electrons are found. Electrons are filled from lowest Energy level to highest, with no more that 2 electrons occupying an orbital. Be able to determine electronic configurations and to determine how many unpaired electrons are in the atom. You are not responsible for knowing the exceptions to the rules, such as Cr and Cu. Nonmetallic character increases from left to right across a row, and from bottom to top in a family in the periodic table.
Ions Be able to determine the electron configuration of ions.
Know electronegativity trends and definition. A polar bond is the result of the differences in electronegativities of the two atoms. The greater the difference in electronegativity, the more polar the bond. Be able to predict polar covalent bonds and their degree of polarity. Lewis Structures Be able to draw Lewis structures including those that require resonance.