Monday, November 30, 2009
Mon-Day 1
Bio 3/6- we examined the chloroplast, the site of photosynthesis in plants. We separated the process of photosynthesis into two distinct parts: the light-DEPENDENT process and the light-INDEPENDENT process. We saw that the light-dependent process (the "photo" part), which takes place in the GRANUM/GRANA (stack of "pancake-shaped" THYLAKOIDS) is used to generate ATP and hydrogen to be used in the light-independent process. In the STROMA (outside of the grana but still INSIDE of the chloroplast), the light-independent reactions occur in the "Calvin Cycle", which uses the ATP generated from the light-dependent reactions as its power/energy source. The main ingredients then used to make glucose in the stroma are CO2, carbon dioxide, and the hydrogen from the water that was split via photolysis in the light-dependent reactions.
AP Chem- we explained the exceptions to the Aufbau Principle in the cases of Cr, Mo, Cu, and Ag. The explanation considers the energy-lowering effect of having 5 half-filled or fully filled d orbitals that cause the electrons to be symmetrically oriented, on average, thus causing a greater average distance between them, which lowers electron-electron repulsion. The energy required to "promote" an s valence electron to the inner d sublevel is not as much or significant compared to the energy-lowering effect of the symmetric distribution of electrons.
We reviewed Coulomb's Law and set up the THREE factors that will determine ALL chemical properties of the elements and thus chemical periodicity.
# posted by C @ 12:32 PM 
