CHEMISTRY COMMUNITY

Nandhini Ekambaram 1L

For 14A the final was significantly more difficult than the midterms. But for 14B the midterms have also been challenging, so I am hoping it won't be too much harder :(

Nandhini Ekambaram 1L

Definitely going to spend most of spring break relaxing this year. Would also be nice to go to the beach/watch sunsets with friends since the weather has been so nice in San Diego.

Nandhini Ekambaram 1L

I am part of Bruins Fighting Pediatric Cancer (BFPC)!

Nandhini Ekambaram 1L

TJ Lai 2H wrote:https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=157&t=21765
viewtopic.php?f=157&t=45665

There's some really great advice in these threads!

Thank you so much!

Nandhini Ekambaram 1L

Megan ODonnell 3F wrote:I love rewatching Grey's Anatomy! The show has so many seasons that its really easy to watch as background music to homework or studying.

Absolute favorite show ever!! Waiting for it to start again this month haha

Nandhini Ekambaram 1L

I am not able to see it either.

Nandhini Ekambaram 1L

I need to study the conceptual topics more since I only focused on the mathematical ones.

Nandhini Ekambaram 1L

I will be taking Chem 14C, Chem 14BL, and LS7B

Nandhini Ekambaram 1L

I know a few people planning on taking Musicology 7 in the spring. That might be a fun class to try!

Nandhini Ekambaram 1L

Last quarter, the UAs and TAs had final review sessions which were super helpful. Each session usually covers a specific topic so you can attend ones you are struggling with. Some sessions also had overall reviews which cover the entire quarter.

Nandhini Ekambaram 1L

Last quarter, the UAs and TAs had final review sessions which were super helpful. Each session usually covers a specific topic so you can attend ones you are struggling with. Some sessions also had overall reviews which cover the entire quarter.

Nandhini Ekambaram 1L

My current favorite snack is trail mix and my all-time favorite food would be burritos.

Nandhini Ekambaram 1L

I realized I also made many careless mistakes on the last exam :( For me it was hard not to rush due to the timing, so hopefully this exam will be better since we have more time.

Nandhini Ekambaram 1L

Both exams were proctored last quarter!

Nandhini Ekambaram 1L

Me too!! I am nervous about any conceptual questions that might be on the exam.

Nandhini Ekambaram 1L

I also don't think 14C will be asynchronous like 14B and 14A

Nandhini Ekambaram 1L

Justin's UA session on Thursday will be a review for the midterm :)

Nandhini Ekambaram 1L

I am planning on taking Chem BL with Chem 14C next quarter.

Nandhini Ekambaram 1L

I am not able to see my grades either, but I think they will update it later.

Nandhini Ekambaram 1L

The midterms were not curved last quarter, so I think it is highly unlikely for them to be curved this quarter :(

Nandhini Ekambaram 1L

I think he will let us know soon. Probably will email us again closer to the exam like last time.

Nandhini Ekambaram 1L

I definitely understand how you feel! For me, the hardest part is the timing. So for the next exam, I am going to time myself when I do the textbook problems and sapling problems. Hopefully this helps!

Nandhini Ekambaram 1L

I am planning on taking Chem 14C and BL in the spring. Hopefully I will see some of you there!

Nandhini Ekambaram 1L

I am planning on taking Chem 14C and Chem 14BL in the spring. I think I will take CL over the summer.

Nandhini Ekambaram 1L

Is anyone planning on taking BL over the summer? Or know how it is to take a lab course over the summer?

Nandhini Ekambaram 1L

I think the partial credit on this exam was for the 10pt questions. Some incorrect answers may give you 5 points.

Nandhini Ekambaram 1L

Last quarter it took about a week to see our scores. Dr. Lavelle usually will tell us when to expect them and after the scores are published.

Nandhini Ekambaram 1L

I also had an issue with the time. That is always the hardest part for me. Since I do the textbook problems and Sapling questions with unlimited time, I don't get practice with doing these problems under a time constraint.

Nandhini Ekambaram 1L

I agree with you as well. This midterm had a few questions that I was also confused about. Definitely felt the change between 14A exams and 14B exam.

Nandhini Ekambaram 1L

My TA canceled our discussion section on Friday because of the exam.

Nandhini Ekambaram 1L

I am not sure if there will be partial credit on this midterm. Last quarter, the first midterm had partial credit, meaning some wrong answers will still give you some points. But, the second midterm didn't have partial credit so you either got all the points for that question or you didn't get any.

Nandhini Ekambaram 1L

I think he will email us beforehand letting us know how many questions there will be and how many points each one is worth.

Nandhini Ekambaram 1L

So far, only Justin has mentioned having a review session during his step-up and workshop on Thursday.

Nandhini Ekambaram 1L

In a UA session, these questions were asked about the phase change diagram: 1) You are heating an ice cube, but realize that the temperature is not changing at all and find it strange. What part of the phase change diagram must you be on? 2) Explain in your own words why being burned by steam is so ...

Nandhini Ekambaram 1L

I would also recommend going over the outlines Dr. Lavelle has posted for each section. By going over each bullet point, you can understand what is expected to be known from each chapter.

Nandhini Ekambaram 1L

I think he will send out an email this week letting us know which topics are covered.

Nandhini Ekambaram 1L

Last quarter he sent out an email saying which topics will be covered on the exam. I am sure he will do the same this time too. The TAs should also know which topics are covered.

Nandhini Ekambaram 1L

I think it will be similar to the final exam last quarter. Each TA will proctor all their discussion sections in one zoom with breakout rooms. They should be able to see your workspace as you take the exam.

Nandhini Ekambaram 1L

Ya I also haven't figured out a way to redo the problem. I usually just look at the solution given to learn from it.

Nandhini Ekambaram 1L

It usually takes Sapling some time to update into the grade book on CCLE. But, you can find the sapling points listed under grades on CCLE.

Nandhini Ekambaram 1L

He emailed us saying no lecture, office hours, and UA sessions on Monday.

Nandhini Ekambaram 1L

I also made a schedule for this quarter. It has helped me keep track of all the zoom meetings and links since it can be overwhelming at times.

Nandhini Ekambaram 1L

Greys Anatomy will always be my favorite TV show! Recently, I have also been watching a lot of Shark Tank and it has been really interesting learning about business ideas.

Nandhini Ekambaram 1L

I agree with everyone else! Last quarter I only did around 5 textbook questions for each unit, but this quarter I will try my best to do them all. This seems like the main thing everyone is recommending to do.

Nandhini Ekambaram 1L

505598869 wrote:The movie Soul on Disney plus was good!

Yes! I also would recommend Soul. I love watching any Pixar or Disney movies for comfort.

Nandhini Ekambaram 1L

I think it is best to do 5 per week just in case. Last quarter, the UAs also recommended doing it weekly.

Nandhini Ekambaram 1L

Last quarter I went to one step up and one workshop per week, but attended more sessions during midterms and finals week. I will try to attend more this quarter because they are really helpful!

Nandhini Ekambaram 1L

Are we able to review our final exam from last quarter? I am not sure if I should reach out to my TA from last quarter or my TA this quarter. Thank you!

Nandhini Ekambaram 1L

On Dr. Lavelle's website :https://lavelle.chem.ucla.edu/class-websites/chem14b/
TAs for lectures 1 and 2 are posted so far.

Nandhini Ekambaram 1L

Also remember to add your sapling code to the same account you have your free trial on so all your work is saved.

Nandhini Ekambaram 1L

For Chem14A, all the lectures were posted under media resources on CCLE. The only live zooms we had with Dr. Lavelle were his office hours and final exam review session.

Nandhini Ekambaram 1L

Yes! This is the link I used to do so: https://lavelle.chem.ucla.edu/forumpassword/index.php

Nandhini Ekambaram 1L

Here is a link that one of the UAs provided: https://docs.google.com/document/d/1mxY ... CyMvc/edit

Nandhini Ekambaram 1L

Yes it is. It will have topics from both midterms and what we learned after midterm 2.

Nandhini Ekambaram 1L

I don't think he has mentioned anything about curving exams or the class.

Nandhini Ekambaram 1L

I don't think this class gives us credit, but my other two classes do.

Nandhini Ekambaram 1L

This is super helpful thank you!

Nandhini Ekambaram 1L

Yes I think so. I believe the entire chem 14 series carries over and chem 14c is organic chemistry.

Nandhini Ekambaram 1L

At one of the reviews, the UA said to memorize the strong acids, but do we also need to memorize strong bases? How can we tell if it is a strong base or acid if we don't specifically memorize them? Yes I think it's best to memorize the strong bases and strong acids, so you know if anything else is ...

Nandhini Ekambaram 1L

I agree with everyone else! I think attending all the review sessions held by the TAs and UAs will help the most. I need a refresher on the topics we learned at the beginning, so I will definitely attend review sessions for those.

Nandhini Ekambaram 1L

I don't think this class is curved, but there might be some readjustments to the grading scale at the end of the quarter once grades are finalized. Hope we hear more information about this soon!

Nandhini Ekambaram 1L

Yes! You can either go to your TA office hours or make an appointment with them to review the exams.

Nandhini Ekambaram 1L

Nancy Yao wrote:December is so intense.

I agree! I am definitely stressed about finals coming up but I am also looking forward to winter break.

Nandhini Ekambaram 1L

For the final I will definitely be attending the review sessions held by the TAs and UAs. If any of them are recorded then I might rewatch them before the exam.

Nandhini Ekambaram 1L

During Dr. Lavelle's office hours he mentioned the amount of questions from one unit is proportional the amount of time we spent on it. For example, we spent more time on Quantum than fundamentals, so it is reasonable to say there will be more questions on Quantum than fundamentals. He also said he ...

Nandhini Ekambaram 1L

I had to make an appointment with my TA to go over Midterm 2.

Nandhini Ekambaram 1L

Sigma bonds are stronger than Pi bonds since Pi bonds have a smaller overlap between the orbitals. But when a Pi bond is put with a Sigma bond it creates a much stronger hold between the atoms, thus double and triple bonds are stronger than single bonds.

Nandhini Ekambaram 1L

Ionic and covalent bonds are both intramolecular forces. Ionic bonds are generally stronger than covalent bonds because ionic is between a positive and negative charge, so that charge to charge attraction is super strong. I am guessing this is why ionic bonds have a higher melting point than covalen...

Nandhini Ekambaram 1L

My TA just replied saying there won't be any discussions or lectures on Friday because the university is closed.

Nandhini Ekambaram 1L

I am also worried about my grade :( It makes me nervous that the second midterm didn't have any partial credit either.

Nandhini Ekambaram 1L

We might be asked to attend another discussion section that is not on Thursday or Friday since not all sections are cancelled. I am also wondering what to do since my discussion is on Friday.

Nandhini Ekambaram 1L

I don't think they have announced it yet, but I am guessing it should take the same time as last time. So, maybe around Thursday again.

Nandhini Ekambaram 1L

Do we need to know Oxidation number for Midterm 2? I didn't see it mentioned on the outlines but it was on the Sapling homework.

Nandhini Ekambaram 1L

Hey guys! I was wondering if Chem14B next quarter will have the same UA sessions. Also, would the TAs have the same discussion section they have now?

Nandhini Ekambaram 1L

Hi! My NSA told me the last quarter of the cluster has the "W" credit which some most med schools accept as Writing/English credit. We would still need two more quarters of English/Writing classes to fulfill the one year requirement med schools have. I don't think the writing I credit from...

Nandhini Ekambaram 1L

Adding on to this question, would Mn+ or V- follow the same exception as Cr since the electron configuration is the same as Cr?

Nandhini Ekambaram 1L

Here is a link to the picture that helped me memorize the trends: https://en.wikipedia.org/wiki/Periodic_ ... trends.svg
Hope this helps!

Nandhini Ekambaram 1L

I am not sure if it's confirmed that 14B is also asynchronous since on MyUcla it still says its online recorded. But, I am sure Lavelle will accept everyone off the waitlist again next quarter. It would be good to confirm with him just in case. Although it says "Online - Recorded" it coul...

Nandhini Ekambaram 1L

I am not sure if it's confirmed that 14B is also asynchronous since on MyUcla it still says its online recorded. But, I am sure Lavelle will accept everyone off the waitlist again next quarter. It would be good to confirm with him just in case.

Nandhini Ekambaram 1L

I've learned that more practice reduces my anxiety. Especially for this class, there are plenty of practice problems in the textbook, UA sessions, and Sapling. After understanding all those questions, I feel more prepared to take the exam.

Nandhini Ekambaram 1L

During Dr. Lavelle's OH, he also mentioned that having negative energy is favorable since it has low energy.

Nandhini Ekambaram 1L

This is super helpful! Thank you for organizing :)

Nandhini Ekambaram 1L

It is going really fast! I feel like the quarter just started, but we are already planning our schedule for winter quarter. I hope I can keep myself motivated for the rest of the quarter, but it is really hard to do so with online classes. Wishing we were on campus!

Nandhini Ekambaram 1L

To find an element's valence electrons, I count the number of columns on the periodic table. But, remember to skip the transition metals. So for example, the element Boron is in the 3rd column, meaning it has three valence electrons. This also makes sense because Neon is in column 8 and having 8 val...

Nandhini Ekambaram 1L

P, S, and Cl are all exceptions to the octet rule (8 valence electrons)

Nandhini Ekambaram 1L

During a step-up session, the UA told us to know P, S, and Cl as the exceptions to the Octet rule. There are definitely more elements that are exceptions, but for this class these three are the only ones we need to know.

Nandhini Ekambaram 1L

Students who have taken the Chem14 series have told me to use my first pass for enrolling in chemistry. Though there may be open spots left for your second enrollment pass, it may not be for the lecture/discussion that fits your schedule. I will use my first enrollment pass for Chem14B and for LS7A....

Nandhini Ekambaram 1L

If you click on "your posts" under quick links on the right side it says how many posts you have made. I think on Thursday this week they will update our grades for posting on Chemistry Community.

Nandhini Ekambaram 1L

I think they will post exam scores after everyone takes it. I heard some answer choices will have partial credit since they might partially be correct.

Nandhini Ekambaram 1L

You can also click on your posts under quick links to see all the posts/replies you have made.

Nandhini Ekambaram 1L

I am going to print the constants/equations list and the periodic table from his website prior to the exam.

Nandhini Ekambaram 1L

1) Yes the midterm will be during your TA discussion time. 2) My TA is allowing us to use our phones to show our work and desk space while taking the exam. 3) I heard it is all multiple choice questions as well 4) The link to the Respondus Exam will be found on CCLE at the start of your discussion s...

Nandhini Ekambaram 1L

For most problems using 3.0 x 10^8 m/s resulted in the correct answer. But for exams, it would be safer to go with the more precise value given on the formula sheet.

Nandhini Ekambaram 1L

When I had to use Respondus for another class, the timer was set for 25 minutes for a 20 minute exam. The 5 extra minutes were given for the Respondus setup. I hope it is the same for the midterm!

Nandhini Ekambaram 1L

Since the electron is returning to a lower energy level from n=5, the lowest it can drop to is n = 1. For each level it drops, there will be a spectral line that will appear. To find the wavelength range, you know that since the electron is returning to a lower energy level it can be anywhere from n...

Nandhini Ekambaram 1L

During a step-up session, the UA told us a good way to remember the difference between the Lyman and Balmer series.
Lyman goes Lower (n=1) and Balmer has the letter B which is the 2nd letter of the alphabet so (n=2).

Nandhini Ekambaram 1L

We will definitely be allowed to use the Constants and Equations sheet from his website during the Midterm. I am not sure yet if we need to print it or if it will be embedded in the exam.

Nandhini Ekambaram 1L

I used the equation Energy (photon) = Work + Kinetic Energy To find the maximum number of electors ejected, you would set the Kinetic Energy = 0. The energy of each photon is equal to the work function since the energy of work is given in J/Photon. Now you can calculate the number of photons equal t...

Nandhini Ekambaram 1L

I agree with everyone else! I would use a scientific/graphing calculator for those problems. I would also add parentheses to the numerator and denominator just to be sure the calculator understands the function.

Nandhini Ekambaram 1L

Hi! I was also a bit confused on that. I think increasing the intensity of the light would increase the number of photons present, but the each photon does not have enough energy to eject an electron. Increasing the number of photons does not allow them to add up all their energy. Each photon still ...

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