CHEMISTRY COMMUNITY

Liliana Aguas 3G

You needed to draw the metal iron, which was Fe connecting to the CN molecule but showing how it connects, like which specific one (C or N) connects and why (due to charges).

Liliana Aguas 3G

I was told the TA's had 4-5 days to grade them but not too sure...

Liliana Aguas 3G

I usually do the chemical rxn with water to tell.

Liliana Aguas 3G

Cisplatin is the biologically active one whereas trans is not due to the better job cis does from bonding at tow G on DNA rather than 1.

Liliana Aguas 3G

Yes they always exist in p orbitals only!

Liliana Aguas 3G

I am also confused about this. Also, how can the N atoms give up a lone pair? Wouldn't that make them only have 4 bonds which would result in 4 electrons when they should have 5? Can someone please explain.

Liliana Aguas 3G

jvera4b wrote:
Liliana Aguas 3G wrote:What day of lecture notes was this topic mostly covered?

I believe November 20.

Thank you so much!

Liliana Aguas 3G

KSong_3C wrote:I think we do because it was one of our homework problems (9C.3)

Oh true, then it is likely that we will need to especially cause he did go over it in class.

Liliana Aguas 3G

When he was going over it in class it seemed like it but it'd be best to ask a ta to be sure.

Liliana Aguas 3G

What day of lecture notes was this topic mostly covered?

Liliana Aguas 3G

Yeah, it's pretty much all the topics in the outline he has, the information he has given during lecture, and homework problems.

Liliana Aguas 3G

Yes, I had talked to my ta and it's the same time so Sunday. And there should be a total of 50 posts because we do 5 a week and there's 10 weeks. :)

Liliana Aguas 3G

Yes exactly, because there's more electrons, there's more protons in the nucleus also so the mass is larger and that makes it a larger molecule. Because it's a larger molecule, the polarizability of it is greater, so there's a higher chance for fluctuability of its electrons around the orbitals so t...

Liliana Aguas 3G

Yes, it'e because it's related to shape and because of the VSEPR you are able to determine if the molecule is nonpolar/ polar overall even if there is dipole moments which this contributes to how the molecule will react (form bonds) with other molecules and how many bonds at that which is where hybr...

Liliana Aguas 3G

Yes, we should just know that and how they interact as mentioned above. And how to show their interaction on a molecule.

Liliana Aguas 3G

I always get really bad anxiety during test week to the point where I get sick and throw up or am constantly nauseous. Anyone have ideas for how to help while also being able to study? You could try meditating and planning little study breaks to look forward to. Also, try to think about tests in th...

Liliana Aguas 3G

Yes, I always like to draw the shape of the electron arrangement then cross of the most reasonable atoms (based on repulsion) and then that is usually how you get T-shape or trigonal pyramidal. It's easier when you have a visual.

Liliana Aguas 3G

Yes, Lavelle said that hybridization is not on the test but sigma and pi bonds are. It's also not cumulative, so it's all the material after the midterm up to tomorrow (11/18) but not hybridization.

Liliana Aguas 3G

Yes, you have to determine which to take off from the electron arrangement shape to get the least amount of repulsion for the molecule shape.

Liliana Aguas 3G

Yes, exactly because the shape determines what direction the dipole moments are pointing toward and from there you can see if they cancel out or not.

Liliana Aguas 3G

Also, will tests be in section again?

Liliana Aguas 3G

I feel like the topic Coordination Compounds and their Biological Importance will not be on test 2, because if we just started the topic Molecular Shape and Structure then there might not be enough time for people to get a grasp of the topic before their tests as their sections might be early on in ...

Liliana Aguas 3G

Although molecules can have polar covalent bonds, there are a few exceptions where the dipole moments cancel each other out; thus, creating non-polar molecules that have polar bonds. Ex: CO 2 and CCl 4 While both C=O and C-Cl bonds are polar, the dipole moments cancel each other out due to their li...

Liliana Aguas 3G

Can someone explain how shielding works? I understand the concept as when there are more expanded shells of electrons the electrons are further away and the ones in the furthest shell are not pulled on as much, but is it the idea that the ones closer to the nucleus are "stealing" more of ...

Liliana Aguas 3G

It decreases as you go down the group because the attraction to the nucleus decreases so there is not as much of a pull as higher up.

Liliana Aguas 3G

Yes and the polar covalent bonds have partial charges attracting other oposite partial bonds.

Liliana Aguas 3G

Only elements from period 3 and beyond can have expanded octets as they can fill up the empty d orbitals that follow higher in energy.

Liliana Aguas 3G

Yes it is easier to use the period trends and understand the concept behind it so you can be given any problem and have the best way to approach.

Liliana Aguas 3G

Is there anyway to know how many times you posted or no? I post during the week and forget by the weekend how many times I have and when I go to see my posts if I posted in the same one twice it wont show me that.

Liliana Aguas 3G

I always get really bad anxiety during test week to the point where I get sick and throw up or am constantly nauseous. Anyone have ideas for how to help while also being able to study?

Liliana Aguas 3G

When it says all the material up to 2D does that include 2.1, 2.7, 2.11, and 2.25 questions from chemical bonds homework?

Liliana Aguas 3G

It's when they have the same number of electrons and same electron configuration! Section 1F.3 explains it with some examples:) So two elements would have to have the same number of electrons as well which would then be the same electron configurations for both? Yes! Because when they have the same...

Liliana Aguas 3G

I understand how to draw the structure with the lowest energy and that ir represents the lowest formal charge, but what does it mean to have lower energy? Like lower energy compared to what or for what? Why do you need the structure with the lowest energy?

Liliana Aguas 3G

It's when they have the same number of electrons and same electron configuration! Section 1F.3 explains it with some examples:)

Liliana Aguas 3G

Yeah exactly what they said. Today he went over Boron as the example. So B completed its octet by F providing both of its electrons. Originally it was Boron Triflouride, BF3, but that only had 6 valence electrons. By adding another Flouride, B completes it octet to form tetraflouroborate anion BF4-,...

Liliana Aguas 3G

Yeah, he clarified today in lecture that it would cover all the material up to Friday of this week because of the campus closure on Monday. So it's Fundamentals, Quantum, and up to 2D on chemical bonds. We're not gonna have all of chemical bonds covered.

Liliana Aguas 3G

Hi, OMG thank you SO much but I don't need them anymore. But, I really appreciate it!!! Also, I have the notes and I can send the ones you need!!! Actually, take her notes! I can still send them but my writing is super messy hahaha hers are probably better HI! So sorry for getting back to you so la...

Liliana Aguas 3G

Have you heard the one about a chemist who was reading a book about helium?

He just couldn't put it down.

Liliana Aguas 3G

Yes, they pull like one or two but overall they are different problems but just similar to the homework questions.

Liliana Aguas 3G

Yes, watching Khan Academy videos is helpful! Especially for this new section. Also, I really recommend going to the step up sessions. They really help me out.

Liliana Aguas 3G

Also, there's no curve? Or if there is how does it work?

Liliana Aguas 3G

Ok, so only the midterm is cumulativa and the tests are just on new material we have not yet been tested on?

Liliana Aguas 3G

What do you guys recommend when reading the textbook? Because it can get really confusing and I don't understand what to take notes on. Also, should we read them before class and take notes or after lecture? I think we can read the textbook whenever we want. If you prefer to learn the topics on you...

Liliana Aguas 3G

Are you talking about the fundamentals from the topic review of high school material?

Liliana Aguas 3G

In spirit of the topic we're learning:))

What do you call quantums of electromagnetic radiation that don't get along?

...... Foe-tons

Liliana Aguas 3G

I agree with what everyone is saying about the Step Up sessions!! They go step by step and it's really good because it sets the foundation of how to do it so then when you do the homework problems it makes you practice the idea.

Liliana Aguas 3G

Hi, last Wednesday I had a job interview and had to leave early so I did't get a chance to get the notes down. If anyone can please send them that would be AMAZING and I would greatly appreciate it :) **Also, if anyone needs any other notes post here!! HI! I have notes from that lecture! If you can...

Liliana Aguas 3G

Hi, last Wednesday I had a job interview and had to leave early so I did't get a chance to get the notes down. If anyone can please send them that would be AMAZING and I would greatly appreciate it :)

**Also, if anyone needs any other notes post here!!

Liliana Aguas 3G

Ok my last one was actually corny(hehe) so here's another:

Want to hear a joke about sodium, bromine, and oxygen???

NaBrO

Liliana Aguas 3G

Did you hear the one about cobalt, radon, and yttrium?????????????????????

It was CoRnY.................. LOL

Liliana Aguas 3G

What do you guys recommend when reading the textbook? Because it can get really confusing and I don't understand what to take notes on. Also, should we read them before class and take notes or after lecture?

Liliana Aguas 3G

Does anyone know when test scores will be out?

Liliana Aguas 3G

Yes, it is all just based on the class average so technically there is no curve.

Liliana Aguas 3G

cnguyen1k wrote:There's a lot of youtube videos and resources that you can use to memorize the conversions. :)

Okay yeah I'm going to have to look into that lol.

Liliana Aguas 3G

Does attending discussion weekly count as part of discussion credit? It doesn't seem mandatory to attend but after week one, homework will be turned in during discussion so if you're not there then you can't turn it in. However, my friend who's also in the class said her Ta told her she can attend ...

Liliana Aguas 3G

cnguyen1k wrote:Yes I think you're going to have to know the unit conversions but it becomes easier with practice.

Okay, I just wasn't sure if we had to for tests, but thank you.

Liliana Aguas 3G

Are we going to have to memorize the exact units for conversion. For example, in the homework E1, I converted pm to m and it was 1m/1*10^-12pm but am I expected to know that there are 1*10^-12 pm for every mole?

Liliana Aguas 3G

What kind of dogs do chemists have?

...... laboratory retrievers......

Liliana Aguas 3G

Yes, the community discussion questions are due on Sunday and NOT in lecture.

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