Friday, September 19, 2008
Fri-Day 2
AP Chem- we took Planck's relationship between the wavelength of electromagnetic radiation and its energy per photon and related that to the light emission spectrum for hydrogen.
Bohr developed his model of the atom based on this experimental evidence that proved that electrons could only have certain specific quantities of energy (their "energy levels"). When an electron either absorbs/gains or emits/loses energy, the energy absorbed or emitted MUST BE exactly equal to the energy difference between the "energy levels" through which the electron underwent a TRANSITION. So electrons in hydrogen atoms can only absorb or emit specific energy photons, which is why the emission spectra is not a continuous rainbow of every possible energy photon.
The bright lines seen on an emission spectrum MUST be the result of specific energy photons that were emitted due to the electrons in the atoms losing energy as they underwent transitions between two specific energy levels. The larger the energy level transition, the larger the energy of photon emitted.
Bohr, using certain physical laws/equations, developed an equation to predict the exact energy levels that exist/are allowed in a hydrogen atom. We used this equation to calculate some possible energy level differences (e.g. n = 6 to n = 3 electron transition) so that we could predict what energy/"color" photons could be emitted and seen on the emission spectrum film.
Practice these problems over the weekend; there are plenty of extra help files, tutorials, and sample problems on Blackboard. Do the ones that we have covered in class and come to me with questions, if any, at extra help on Monday morning.
Bio 6- we went over test-taking skills that can be applied to all subject tests and then we discussed specific skills that can improve your written expression and biology knowledge. Practice these test-taking skills on each of your tests and you will guarantee that you score higher than you otherwise would.
Here is a link to a website that shows dehydration synthesis of a disaccharide from two monosaccharides:
dehydration synthesis
and here is a site that shows hydrolysis of a disaccharide into two monosaccharides:
hydrolysis
This weekend, answer any objective questions that we have covered in the notes so far.
Bio 7/8-we went over test-taking skills that can be applied to all subject tests and then we discussed specific skills that can improve your written expression and biology knowledge. Practice these test-taking skills on each of your tests and you will guarantee that you score higher than you otherwise would.
We discussed hydrolysis and dehydration synthesis; we then discussed the structure and functions of fats/lipids.
Here is a link to a website that shows dehydration synthesis of a disaccharide from two monosaccharides:
dehydration synthesis
and here is a site that shows hydrolysis of a disaccharide into two monosaccharides:
hydrolysis
This weekend, answer any objective questions that we have covered in the notes so far.
Bohr developed his model of the atom based on this experimental evidence that proved that electrons could only have certain specific quantities of energy (their "energy levels"). When an electron either absorbs/gains or emits/loses energy, the energy absorbed or emitted MUST BE exactly equal to the energy difference between the "energy levels" through which the electron underwent a TRANSITION. So electrons in hydrogen atoms can only absorb or emit specific energy photons, which is why the emission spectra is not a continuous rainbow of every possible energy photon.
The bright lines seen on an emission spectrum MUST be the result of specific energy photons that were emitted due to the electrons in the atoms losing energy as they underwent transitions between two specific energy levels. The larger the energy level transition, the larger the energy of photon emitted.
Bohr, using certain physical laws/equations, developed an equation to predict the exact energy levels that exist/are allowed in a hydrogen atom. We used this equation to calculate some possible energy level differences (e.g. n = 6 to n = 3 electron transition) so that we could predict what energy/"color" photons could be emitted and seen on the emission spectrum film.
Practice these problems over the weekend; there are plenty of extra help files, tutorials, and sample problems on Blackboard. Do the ones that we have covered in class and come to me with questions, if any, at extra help on Monday morning.
Bio 6- we went over test-taking skills that can be applied to all subject tests and then we discussed specific skills that can improve your written expression and biology knowledge. Practice these test-taking skills on each of your tests and you will guarantee that you score higher than you otherwise would.
Here is a link to a website that shows dehydration synthesis of a disaccharide from two monosaccharides:
dehydration synthesis
and here is a site that shows hydrolysis of a disaccharide into two monosaccharides:
hydrolysis
This weekend, answer any objective questions that we have covered in the notes so far.
Bio 7/8-we went over test-taking skills that can be applied to all subject tests and then we discussed specific skills that can improve your written expression and biology knowledge. Practice these test-taking skills on each of your tests and you will guarantee that you score higher than you otherwise would.
We discussed hydrolysis and dehydration synthesis; we then discussed the structure and functions of fats/lipids.
Here is a link to a website that shows dehydration synthesis of a disaccharide from two monosaccharides:
dehydration synthesis
and here is a site that shows hydrolysis of a disaccharide into two monosaccharides:
hydrolysis
This weekend, answer any objective questions that we have covered in the notes so far.
# posted by C @ 10:35 AM 
