Monday, November 7, 2011
Mon-Day 2
AP Chem - we discussed the Bohr model of the atom, focusing on the cause of the relative possible energies of the one electron in an H atom, He + ion , or Li 2+ ion i.e. the greater the number of protons, the greater the electrostatic attraction for the electron, thus the lower its potential energy in a given principal level. The much more important result of this is that each element has DIFFERENT DIFFERENCES in energy between any two given levels so that when an electron transition (energy level change) occurs, each different element emits or absorbs different energy photons; this is how each element has a unique emission or absorption spectrum!
Bohr's model only works for one-electron systems because it does not account for the electron to electron potential energy raising repulsion that causes different than predicted DIFFERENCES in possible energies of a given electron.
We looked at the Rydberg equation that Bohr derived from Coulomb's Law, in order to calculate the possible electron energies in a one-electron "system" i.e. atom or ion.
Bio - we reviewed the transcription/translation animation, and then we began to discuss/draw out the process of transcription.
Bohr's model only works for one-electron systems because it does not account for the electron to electron potential energy raising repulsion that causes different than predicted DIFFERENCES in possible energies of a given electron.
We looked at the Rydberg equation that Bohr derived from Coulomb's Law, in order to calculate the possible electron energies in a one-electron "system" i.e. atom or ion.
Bio - we reviewed the transcription/translation animation, and then we began to discuss/draw out the process of transcription.
# posted by C @ 9:29 PM 
