Monday, November 23, 2009
Mon-Day 1
Bio 3/6- we began our new unit on Photosynthesis and Respiration. These two opposite processes involve the absorption and use of energy (Photosynthesis) and the release/extraction of energy (Respiration).
We discussed the two types of nutrition and then focused on the process of photosynthesis, which can be performed only by autotrophs (plants and algae).
We discussed the meaning of photosynthesis and the wrote out the chemical and word equations for this process. We even wrote the chemical structures and balanced the equation so that you can SEE the beginning and final molecules involved. We also showed the need to balance the equation.
AP Chem- we did some quantum number practice and then we accounted for the relative sublevel energies of a principal energy level. We used the terms "shielding" and "penetration" to show how and why "s" electrons are lower in energy than "p", "d", and "f" electrons. Further, we saw that the more penetrating electrons shield some of the nuclear charge from the less penetrating sublevel electrons thus making those less penetrating sublevel electrons higher in potential energy; this is why, for any principal energy level with a high enough number, the relative sublevel electron energies are s < p < d < f ...
We then did some more orbital diagrams and electron configurations (these are TWO DIFFERENT terms meaning two DIFFERENT representations). Do NOT confuse these two terms or use them interchangeably!
We started to explain the Aufbau anomaly for Cr, Mo, Cu, and Ag but time did not permit a full explanation, thus this EXPLANATION will not be on the test, though you MUST know the four anomalous elements' electron configurations and orbital diagrams.
# posted by C @ 10:41 AM 
