SciHawks

AP Chem - We determined the wavelength of EMR emitted for a given electronic transition in H, and Li 2+; we saw that the greater number of protons in Li 2+ (as compared to H) causes lower PE levels of the electron in that ion yet greater energy difference for a given transition. Thus, we calculated and proved that each element emits different energy photons even for the same principal energy level transitions.
We then discussed the Schroedinger equation, which solves for the possible electron energies in a given atom by taking into account:
1. the number of protons in the nucleus
2. the wave nature of the electron
3. the particle nature of the electron
4. electron-electron repulsion in the atom
5. the angular momentum of the electron

Each solution consists of FOUR quantum numbers, the first two of which (n and l) determines the energy of the electron.
Each quantum number is associated with a physical meaning:
n- principal quantum number is associated with the average distance that the electron is from the nucleus.
l- angular momentum number tells the SHAPE of the region of probability of an electron with that specific angular momentum, l, and overall energy, n+l .
ml - magnetic spin number is associated with the orientation in space of the orbital that stems from the l number
ms - the magnetic "spin" of the electron, which is either +1/2 or -1/2 and is a magnetic property of spinning charged particles.

Bio - we did two detailed examples of transcription and translation; we learned to use the mRNA codon chart. Knowing the amino acids coded for by mRNA from this chart, we could develop a DNA codon chart or a tRNA anti-codon chart.