Wednesday, January 10, 2007
Wednesday, Day 7
Honors: we covered multiple examples, with explanation, of substances that had polar bonds that were either polar molecules or nonpolar molecules. We accounted for molecular polarity in terms of 1. bond polarity 2. electronic geometry around the central atom which leads to 3. molecular geometry. These three factors determine how and why there is either a symmetric distribution of charge (nonpolar molecules) or an asymmetric distribution of charge (polar molecules with a definite single partial negative "side" and a definite partial positive "side"). We saw that, ANY time there is a lone pair or pairs of nonbonded electrons on the central atom, the molecule would ultimately be polar with the net partial negative "side" by the lone pair or pairs of electrons.
Make sure that you draw what you are trying to explain. REFER to your drawing with words or arrows or both! Good luck tomorrow!
Regents: we covered multiple examples, with explanation, of substances that had polar bonds that were either polar molecules or nonpolar molecules. We accounted for molecular polarity in terms of 1. bond polarity 2. electronic geometry around the central atom which leads to 3. molecular geometry. These three factors determine how and why there is a symmetric distribution of charge (nonpolar molecules) or an asymmetric distribution of charge (polar molecules with a definite single partial negative "side" and a definite partial positive "side"). We saw that, ANY time there is a lone pair or pairs of nonbonded electrons on the central atom, the molecule would ultimately be polar with the net partial negative "side" by the lone pair or pairs of electrons.
The class seems to be doing well with this topic. Study hard and write everything out on scrap before you choose your answers tomorrow. Good luck!
AP: We almost completed the all-important bonding unit by discussing network solids, molecular solids, ionic solids, ion-dipole attractions and their effect on solubility. We will wrap up the few remaining points on that topic and commence Kinetics tomorrow.
Make sure that you draw what you are trying to explain. REFER to your drawing with words or arrows or both! Good luck tomorrow!
Regents: we covered multiple examples, with explanation, of substances that had polar bonds that were either polar molecules or nonpolar molecules. We accounted for molecular polarity in terms of 1. bond polarity 2. electronic geometry around the central atom which leads to 3. molecular geometry. These three factors determine how and why there is a symmetric distribution of charge (nonpolar molecules) or an asymmetric distribution of charge (polar molecules with a definite single partial negative "side" and a definite partial positive "side"). We saw that, ANY time there is a lone pair or pairs of nonbonded electrons on the central atom, the molecule would ultimately be polar with the net partial negative "side" by the lone pair or pairs of electrons.
The class seems to be doing well with this topic. Study hard and write everything out on scrap before you choose your answers tomorrow. Good luck!
AP: We almost completed the all-important bonding unit by discussing network solids, molecular solids, ionic solids, ion-dipole attractions and their effect on solubility. We will wrap up the few remaining points on that topic and commence Kinetics tomorrow.
# posted by C @ 8:54 PM 
