A discussion on systematics of nuclear properties are presented. Mass, mass excess, and mass distribution within the nucleus is presented. Mass excess data are used to calculate energies in decays. Equations for determining nuclear radii are provided. Models that are used to describe the stability of nuclei are introduced. Nuclear shapes and structures are introduced.
One definite advantage of having this as an online class is being able to listen to the lecture multiple times. I admit that I started to get a little lost halfway through this lecture, and it took me a while to get the Q value calculator to give me an answer. It's a nice resource to have though, because it's a lot simpler than doing the calculations. I found the liquid-drop and magic number sections especially interesting. A nice lecture! Thank you!
ReplyDeleteSam
DeleteFor the q value calculator there seems to be a flaw. You can get the answers easily for alpha decay of 212Bi. For the EC and beta decay if you follow the instruction I find you get an error. if you just enter the isotope, such as 126I, and press enter you get Q values for a wide range of decays, including what was requests.
thanks for pursuing this.
This was another well formatted lecture. I had an issue whenever i tried going to the q-value calculator website, i kept getting an error (HTTP Status 500). However, I was able to easily find all the mass values I needed from the Nuclear Wallet Cards and using the formulas for the associated decays found the q-values for the quiz.
ReplyDeletesee my comment above on the q-value calculator. I will make a video and post it tonight.
DeleteI like these lectures. You've done very well in speaking clearly, formulating your thoughts, explaining the concepts, and rendering the video in a logical order.
ReplyDeleteI also had issues going to the website for the Q-value calculator. The same Error 500 has showed up for me.
Also, I am having trouble submitting the quizzes through the logical mechanism (which is the same mechanism you have explained in Lecture 0 supplement), so instead I submitted by attaching the file to an e-mail and sent it that way. Hopefully, that mechanism should agree with the program you use for these quizzes. There should be no issues.
thanks for the comments.
DeleteThanks for the online lectures! I like being able to listen to sections of the lecture that I found confusing or hard more than one time until I actually get it. I also seemed to have problems with the Q-value calculator. Is there something wrong with the site?
ReplyDeleteOkay, understand about the q value calculator. I will make a video on it.
ReplyDeleteken
Once again an interesting lecture. The website for the Q value calculator did not work so i calculated the Q value using the MeV values i found on the same site but a different link. I also sent quiz 2. Here is the link
ReplyDeletehttp://www.nndc.bnl.gov/wallet/wccurrent.html
click on one of the elements to see the data
This particular lecture started piecing together material from previous classes. This is the first class I have taken with practical use for E=mc^2.
ReplyDeleteThat is what I like about nuclear properties, mass changes are evident. This is where the large amount of energy comes from in fission.
DeleteThis lecture are formatted really well and are a great way to help study. Normally I am not one for an online class just because of the fact that you are really just learning the material yourself, but with this format the lectures allow us to learn from the comforts of our home and listen to your lectures in order to learn the material.
ReplyDeleteFor some reason the Q calc was not working properly for some of the settings that were being search, so I did the calculations by hand using your examples which were really helpful in understanding how to do the calculation.
Nice way to solve the Q values by hand. I posted a video linked in lecture 2 that shows how to defeat the bug in the Q value calculator.
DeleteI really enjoyed this lecture. It was easy to follow and it's great being able to stop and repeat parts when they get a little confusing.
ReplyDeleteIt took me a minute to figure out the Q calc but once I did, I didn't have any issues with it.
glad to hear to did well with the q value calculator
DeleteThe lecture was very informative. I am starting to get a better understanding of the different nuclear properties and how different decays occur. For the Q values, I solved it manually by hand by finding the mass excess for each isotope. The examples provided in the lecture were very useful in helping me solve for Q.
ReplyDeleteawesome in solving the Q values.
DeleteIt is really exciting to expand my general chemistry knowledge in this area. I am really enjoying the way you have set up the class. Thank you for making the class so logical.
ReplyDeletethank you for the comments.
DeleteI thought the description of nucleic structure and properties, which is much more in depth than in previous chemistry classes, was interesting because of the analogies between electron and electron cloud properties such as spin, orbitals, and the nuclear skin. I am looking forward to future lectures describing the atomic nucleus in even more detail.
ReplyDeleteTyler, as a chemist we are used to electrons in orbitals. The periodic table has trends and energy gaps that we recognize, think of the noble gases and filling the electron orbitals. We will see that protons and neutrons have similar properties.
DeleteI felt that this lecture had a great deal of information, however having the option to replay any particular slide was very helpful. The video you posted regarding the Q calculator was also helpful. I checked the answers I obtained from manually solving for the Q value against the values obtained by the Q calculator.
ReplyDeletethanks for the comment. I do think being able to replay a section is helpful. I try to make each slide as independent as possible so this is facilitated.
DeleteThis lecture was very eye opening to what is possible within radiochemistry and shocked me at what we can calculate and determine about an element. I appreciate how you broke down each calculation and thoroughly explained. Thank you also for sending us a supplement presentation for the Q calculator and displayed how to find what types of decay are possible on the Table of Isotopes.
ReplyDeletethanks for the comments. I did see in the lecture that the URL for the q value calculator was not completely correct.
DeleteI finished the lecture and submitted the quiz. I am experiencing some computer troubles, so I apologize if I ended up sumbitting it a few times over.
ReplyDeleteThank you so much for posting the supplementary video! I never would have figured out how to work around the bug, but it was so simple once I'd watched the video.
Just finished the lecture and submitted the quizz. I have a quick question, for a while now i thought that all elements were created in stars through fusion. Can we only create up to iron with this process? How are heavier elements created?
ReplyDeleteThanks!
We will discuss the s process and r process for making elements in some upcoming lectures.
DeleteI just submitted my quiz 2. I cannot access quiz 3. Is it not posted yet?
ReplyDeleteIn regards to lecture 2. Everything was clear except with the nuclear skin definition. It made more sense after listening to the last part of the lecture for a few times.
Thank you!
Sorry about quiz 3. I will have it posted by 9 September. Glad to hear about reviewing sections. I do think this helps.
DeleteJust posted Quiz 3
DeleteI have submitted quiz 2. The lecture was very helpful in describing how to calculate the Q values by hand and describing the concept of nuclear density. Thank you for posting the second video for the online Q calculator to help troubleshoot around the software error.
ReplyDeletethanks for your comments and verification on the need for the extra lecture.
ReplyDeleteThe following have submitted the PDF Quiz for lecture 2
ReplyDeleteAleshire Kyle
Banaga Rosa
Ciulei Mihaela
Doan David
Dotson Julie
Eister K. "Alan"
Escobedo Daniel
Hicks Ryan
Kebede Fitsum
Kutsch Kevin
Miller Samantha
Okada Naomi
Palma Derrick
Zegarac Marko
If you have not submitted your PDF quiz for lecture 2 please do so.
thanks
I watched the lecture, and there definitely a lot to review over in this, but still chemistry is amazing.
ReplyDelete