Chemical Bonding Fun

This new unit, Chemical Bonding, is all about how atoms and molecules act when in chemical bonds. We have mostly been looking at covalent bonds this unit, and how to draw these molecules in different structures such as Lewis structures and 3-D geometry structures.

Ionic Bonds:

• Composed of a metal and nonmetal bonded to one another
• One atom in the resulting molecule has "stolen" the other atoms electrons

Covalent Bonds:

• Two nonmetals bonded together
• Share electrons

Lewis Structures:

• These structures show where the valence electrons are located on the molecule
• On this structure, since the F atoms need to have 8 electrons on their outermost valence shell to be stable, we added three non-bonding pairs of electrons (6 electrons) to the F valence shell.
• A correct Lewis structure always shows the correct number of bonds and non-bonding pairs of electrons on each atom

3-D Structure:

• 3-D has the same structure as Lewis structure, but instead we use a solid line and a dashed line to show that the molecule is 3 dimensional
• These different lines help show the three dimensions on a two dimension scale