Miscellaneous Tips from Homework

Things to Know:

• Lattice Energy is indirectly related to the size of ions.  As ionic size increases from top to bottom in a group, lattice energy decreases.
• Electronegativity decreases from top to bottom in a group; increases from left to right in a period.
• Covalent bonds have a difference of 0; Ionic bonds have a difference that is greater than 2; Polar Covalent bonds are everything that fall in between.
• If two elements are in close proximity to each other on the periodic table, they're more likely to have similar electronegativities.
• Make sure all elements (except hydrogen) have a complete octet AND the valence electrons are all represented in the structure.