Search found 50 matches

by Jessica Manriquez 1H
Thu Dec 10, 2020 5:03 pm
Forum: Naming
Topic: Hydro vs Aqua
Replies: 2
Views: 28

Re: Hydro vs Aqua

Kailani_Dial_3G wrote:Aqua is when it is in the brackets of the coordiantion compound. Hydrates is when it is on the outside of the brackets.

Thank you !!!
by Jessica Manriquez 1H
Thu Dec 10, 2020 1:27 pm
Forum: Naming
Topic: Hydro vs Aqua
Replies: 2
Views: 28

Hydro vs Aqua

Hi everyone! happy week 10 :)
I was wondering if anyone knew when we would name water hydro vs aqua when naming a coordination compound? Thanks in advance :)
by Jessica Manriquez 1H
Tue Dec 08, 2020 8:10 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate Ligands
Replies: 2
Views: 27

Polydentate Ligands

Hi everyone! Im having a hard time with polydentate ligands and was wondering if anyone had a good way to remember/identify them in a given problem. Thanks all in advance :)
by Jessica Manriquez 1H
Tue Dec 08, 2020 8:06 pm
Forum: Bronsted Acids & Bases
Topic: Acid strength through bonds
Replies: 6
Views: 43

Re: Acid strength through bonds

yes thats completely right !!
by Jessica Manriquez 1H
Sun Dec 06, 2020 8:54 pm
Forum: Naming
Topic: "(en)" Sapling
Replies: 19
Views: 157

Re: "(en)" Sapling

(en) is short for ethylenediamine and it is a bidentate ligand
by Jessica Manriquez 1H
Fri Dec 04, 2020 1:30 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Sapling hw#9 question 2?
Replies: 3
Views: 40

Re: Sapling hw#9 question 2?

I think it would be really helpful to look at the subscripts of the different compounds attached to the TM; I noticed you basically followed this rule, the only one you have wrong is [Co(SO4)(NH3)5], for this one if you look at the subscripts you would see the you have 5 ammonia, and 1 sulfate; ther...
by Jessica Manriquez 1H
Wed Dec 02, 2020 7:51 pm
Forum: Student Social/Study Group
Topic: How are you?
Replies: 117
Views: 888

Re: How are you?

Nancy Yao wrote:December is so intense.

I completely agree, I'm mentally drained lol
by Jessica Manriquez 1H
Tue Dec 01, 2020 2:57 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number On Ligands
Replies: 2
Views: 36

Re: Coordination Number On Ligands

Jayden_Yamasaki_2J wrote:I think if a ligand is greater than monodentate it will form more than 1 bond. For example a bidentate would form 2 bonds and a tridentate would form 3. This increased number of bonds would also then change the coordination number.

Thank you :))
by Jessica Manriquez 1H
Tue Dec 01, 2020 1:01 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number On Ligands
Replies: 2
Views: 36

Coordination Number On Ligands

Hi all, I had a question regarding coordination number on ligands that are greater than monodentate, since these can form more than 1 bond, would the coordination number change or would it still count as one bond? Thank you in advance.
by Jessica Manriquez 1H
Fri Nov 27, 2020 8:20 pm
Forum: Hybridization
Topic: Delocalized Pi Bonds
Replies: 3
Views: 46

Re: Delocalized Pi Bonds

A delocalized pi bond would occur in a molecule with resonance structures, where the pi bond in shared amongst the molecules. An example of this is benzene, where the Carbons the same 3 pi bonds the C-C bonds are somewhere between single and double bonds. A regular, localized pi bond is confined wi...
by Jessica Manriquez 1H
Fri Nov 27, 2020 8:00 pm
Forum: Hybridization
Topic: Delocalized Pi Bonds
Replies: 3
Views: 46

Delocalized Pi Bonds

Hi all! Im sure this has been asked before but can someone please explain the difference between a delocalized pi bond and a regular pi bond. Thank you in advance. :)
by Jessica Manriquez 1H
Wed Nov 25, 2020 1:37 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Reason why lone pairs decrease bond angle
Replies: 7
Views: 52

Re: Reason why lone pairs decrease bond angle

Since lone pairs have very high repulsion, they push bonding pairs away from themselves and closer to other bonding pairs, therefore decreased bond angles between them. Hope this helped :)
by Jessica Manriquez 1H
Sun Nov 22, 2020 5:30 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Week 7-8 #2
Replies: 3
Views: 34

Re: Sapling Week 7-8 #2

Im pretty sure this one would be square planar, due to the fact that it follows the formula AX4E2, which means 4 bonded and 2 lone pairs, and its similar to the xenon tetrafluoride example Dr. Lavelle went Over in lecture 21; Hope this helped :)
by Jessica Manriquez 1H
Mon Nov 16, 2020 8:19 pm
Forum: Lewis Structures
Topic: Lewis structures
Replies: 2
Views: 44

Re: Lewis structures

Hi! my TA mentioned that for this midterm we are not required to memorize any formulas and that Dr. Lavelle will provide us with the written formulas; Hope this helped :)
by Jessica Manriquez 1H
Mon Nov 16, 2020 12:43 am
Forum: Lewis Structures
Topic: Central Atom of Lewis Structure
Replies: 3
Views: 27

Re: Central Atom of Lewis Structure

Hi! Dr. Lavelle has mentioned that the least electronegative molecule will be placed in the center of a Lewis structure. Hope this helped :)
by Jessica Manriquez 1H
Sun Nov 15, 2020 9:55 pm
Forum: Lewis Structures
Topic: Lewis acids and bases
Replies: 23
Views: 130

Re: Lewis acids and bases

Lewis acids are elements that accept an e- while bases are those that donate e-
by Jessica Manriquez 1H
Sun Nov 15, 2020 9:52 pm
Forum: Trends in The Periodic Table
Topic: Ion Trends
Replies: 18
Views: 131

Re: Ion Trends

https://sciencenotes.org/periodicity-de ... chemistry/
the main picture in this website really helped me memorize the trends; Hope this helped :)
by Jessica Manriquez 1H
Sun Nov 15, 2020 9:49 pm
Forum: Resonance Structures
Topic: Sapling 9
Replies: 5
Views: 58

Re: Sapling 9

the one with the formal charge that is closest to 0
by Jessica Manriquez 1H
Sun Nov 15, 2020 6:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Nomenclature on Midterm
Replies: 5
Views: 51

Re: Nomenclature on Midterm

Adding to this, my TA said Dr. Lavelle will specify the formulas we need in the problem, we wont be expected to memorize any; Hope this helped :)
by Jessica Manriquez 1H
Sun Nov 15, 2020 4:49 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 200

Re: bond length

Like most people have said, i don't think we necessarily have to know how to calculate the bond length, but we should know which bonds are longer and which bonds are shorter; so for example double bonds are shorter than single bonds, but triple bonds are shorter than double bonds, single bonds are a...
by Jessica Manriquez 1H
Sat Nov 14, 2020 12:50 am
Forum: Ionic & Covalent Bonds
Topic: London Dispersion Forces
Replies: 11
Views: 101

London Dispersion Forces

Hi all! Im kind of confused on the interpretation of London forces, and was wondering if anyone has good way to distinguish these from other types of bonds. Thank you in advance :)
by Jessica Manriquez 1H
Sat Nov 14, 2020 12:41 am
Forum: Dipole Moments
Topic: Hydrogen Bonds
Replies: 6
Views: 67

Re: Hydrogen Bonds

Just an attraction;
by Jessica Manriquez 1H
Thu Nov 12, 2020 1:28 pm
Forum: Octet Exceptions
Topic: Octet Exceptions
Replies: 2
Views: 19

Octet Exceptions

Hi all! im sure this has been asked before, but how do we know which elements are exceptions to the octet rule?
Thanks in advance :)
by Jessica Manriquez 1H
Sun Nov 08, 2020 1:20 am
Forum: Electronegativity
Topic: Electronegativity vs. Electron Affinity
Replies: 8
Views: 41

Re: Electronegativity vs. Electron Affinity

electron affinity relates to the amount of energy released when an electron binds to an element; electronegativity relates to how well an atom can attract an atom.
hope this helped :)
by Jessica Manriquez 1H
Sun Nov 08, 2020 1:08 am
Forum: Determining Molecular Shape (VSEPR)
Topic: n, l, mi
Replies: 8
Views: 69

Re: n, l, mi

https://www.youtube.com/watch?v=CP35NuspGlk
I personally found this video extremely helpful, it really helped solidify the concept of n,l,ml
Hope this helped :)
by Jessica Manriquez 1H
Thu Nov 05, 2020 2:16 pm
Forum: Student Social/Study Group
Topic: Studying Tips
Replies: 23
Views: 169

Re: Studying Tips

I have found the textbook problems to be the most helpful form of review; there are quite many so by the time you finish most of them you have a good understanding of the concepts and how to apply them. There is also an answer sheet so that you could check and compare your answers which is also a he...
by Jessica Manriquez 1H
Sun Nov 01, 2020 9:36 pm
Forum: Trends in The Periodic Table
Topic: Oxygen Ionization
Replies: 3
Views: 55

Re: Oxygen Ionization

Since fluorine has more electrons and protons, it has a greater effective nuclear charge; this means that the electrons in the fluorine atom will be closer to the nucleus, making it harder to remove them. Although oxygen has a smaller atomic radius than nitrogen, nitrogen has balanced px,py,pz subl...
by Jessica Manriquez 1H
Sun Nov 01, 2020 9:25 pm
Forum: Trends in The Periodic Table
Topic: Oxygen Ionization
Replies: 3
Views: 55

Oxygen Ionization

Hi can someone explain why oxygen would have a lower 1st ionization than both Nitrogen and fluorine? Thank you in advance :)
by Jessica Manriquez 1H
Sun Nov 01, 2020 1:24 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Half full vs full d shell
Replies: 3
Views: 39

Re: Half full vs full d shell

So since d orbitals can hold 10 electrons when an element in the d orbital is close to having a half full (5) or full (10) d subshell, it takes an electron from the preceding s orbital to make the element more stable. Dr. Lavelle mentioned that this was done for symmetry reasons, since it makes more...
by Jessica Manriquez 1H
Fri Oct 30, 2020 3:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Exams
Replies: 8
Views: 105

Re: Practice Exams

I would strongly suggest reviewing the textbook outline problems, they facilitate how to approach a problem. Theres answer key for the textbook problems so that you could see how they work out the answer if you're unsure of how to approach a problem; Hope this helped :)
by Jessica Manriquez 1H
Fri Oct 30, 2020 3:00 pm
Forum: *Shrodinger Equation
Topic: Midterm Scores
Replies: 30
Views: 349

Re: Midterm Scores

Many people have mentioned that the scores will be released after every discussion section has taken their midterm, however this is not confirmed by Dr. Lavelle , so as of right now no one really knows when they'll be released. Hope this helped. :)
by Jessica Manriquez 1H
Fri Oct 30, 2020 2:31 pm
Forum: DeBroglie Equation
Topic: When to Use De Broglie
Replies: 16
Views: 131

Re: When to Use De Broglie

I associate De Broglie with velocity, so if I see a question asking for the wavelength of an electron going at a certain speed, I immediately think of De Broglie; Hope this helped :)
by Jessica Manriquez 1H
Tue Oct 27, 2020 12:42 am
Forum: Administrative Questions and Class Announcements
Topic: how far in the sapling hw does midterm 1 go to
Replies: 5
Views: 74

Re: how far in the sapling hw does midterm 1 go to

hi! someone had mentioned doing problems 1-10, 12, 14, 19, 22-27, which are what will be covered in MT1; hope this helped :)
by Jessica Manriquez 1H
Sun Oct 25, 2020 10:36 pm
Forum: DeBroglie Equation
Topic: HW problem #25
Replies: 4
Views: 57

Re: HW problem #25

Perfect!! thank you!
by Jessica Manriquez 1H
Sun Oct 25, 2020 9:02 pm
Forum: DeBroglie Equation
Topic: HW problem #25
Replies: 4
Views: 57

HW problem #25

Hi everyone! im kind of lost on how to start this problem and was looking for any guidance; thanks in advance. :) The E.coli bacterium is about 2.0 μmlong. Suppose you want to study it using photons of that wavelength or electrons having that de Broglie wavelength. What is the energy Ephoton of the ...
by Jessica Manriquez 1H
Sun Oct 25, 2020 8:44 pm
Forum: Administrative Questions and Class Announcements
Topic: Sampling HW Problems
Replies: 4
Views: 55

Re: Sampling HW Problems

Mine are also still shuffled, however someone had mentioned doing problems 1-10, 12, 14, 19, 22-27, which are what will be covered in MT1; hope this helped :)
by Jessica Manriquez 1H
Fri Oct 23, 2020 2:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Modules [ENDORSED]
Replies: 1
Views: 41

Modules [ENDORSED]

Hi, I'm not sure if this has been asked/answered before, but I was wondering if there will be more modules posted for these upcoming lectures. I personally found the modules extremely helpful and they really helped solidify the content of the lectures, so I'm wondering if there will be more in the f...
by Jessica Manriquez 1H
Wed Oct 21, 2020 6:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 1 date
Replies: 2
Views: 39

Re: Midterm 1 date

the midterm is during your discussion time next week; Hope this helped :)
by Jessica Manriquez 1H
Wed Oct 21, 2020 2:39 pm
Forum: General Science Questions
Topic: Lecture Question
Replies: 4
Views: 64

Re: Lecture Question

The mass of an electron is a set value, so it will always be 9.1 x 10^-31 kg. Hope this helped :)
by Jessica Manriquez 1H
Wed Oct 21, 2020 12:54 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra
Replies: 2
Views: 27

Atomic Spectra

Hi, I'm not sure if this has been asked or answered before but, after you find the delta e of an equation, in terms of delta E= -(h*R)/n^2, and it comes out negative due to the loss of energy, how come you lose the negative sign if they're asking for the frequency? Thanks in advance.
by Jessica Manriquez 1H
Mon Oct 19, 2020 12:53 am
Forum: *Black Body Radiation
Topic: Midterm
Replies: 14
Views: 241

Re: Midterm

I remember Dr.Lavelle mentioning black body radiation will not be included in the scope of 14A
by Jessica Manriquez 1H
Fri Oct 16, 2020 4:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 4 Midterm
Replies: 3
Views: 112

Re: Week 4 Midterm

I think it would be up to week 3 material; hope this helped
by Jessica Manriquez 1H
Fri Oct 16, 2020 4:35 pm
Forum: Photoelectric Effect
Topic: When are electrons excited vs ejected
Replies: 16
Views: 136

Re: When are electrons excited vs ejected

electrons would be ejected when talking about the photoelectric effect, which is why the detector served to couldn't the number of electrons that were ejected; in the atomic spectroscopy experiment youre basically trying to measure at which frequency the electrons get excited into a next level; henc...
by Jessica Manriquez 1H
Fri Oct 16, 2020 4:28 pm
Forum: Photoelectric Effect
Topic: photoelectric effect
Replies: 17
Views: 145

Re: photoelectric effect

Yes, the threshold and work function basically mean the same thing. Threshold was used when the experiment was first conducted, but now its more commonly known as the work function.
by Jessica Manriquez 1H
Sat Oct 10, 2020 9:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework Due Time
Replies: 8
Views: 51

Re: Homework Due Time

I'm pretty sure they mean tomorrow (Sunday) at 11:59pm.
by Jessica Manriquez 1H
Fri Oct 09, 2020 3:07 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Reactions Order
Replies: 31
Views: 271

Re: Balancing Chemical Reactions Order

I find it really helpful to list right underneath how many units of each element you have, and that way try to figure out how many you would need to make them balanced, after that I go back plug in the values I came up with and then see if it works out.
by Jessica Manriquez 1H
Fri Oct 09, 2020 3:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Exam Regulations
Replies: 7
Views: 66

Exam Regulations

Hi! I'm not sure if this has been answered before, but will the midterms/final be open book or not? thanks in advance :)
by Jessica Manriquez 1H
Fri Oct 09, 2020 3:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Petition to Bring Music Back To Lectures [ENDORSED]
Replies: 34
Views: 558

Re: Petition to Bring Music to Back To Lectures [ENDORSED]

I completely agree; seeing Dr. Lavelle vibe to the music prepared me for the content of the lectures.
by Jessica Manriquez 1H
Thu Oct 08, 2020 6:46 pm
Forum: General Science Questions
Topic: Grades
Replies: 4
Views: 64

Re: Grades

Hi! grades should be posted on CCLE on the grades section; they should also appear on MyUCLA. I have found that some professors update grades on CCLE before they do on MyUCLA. Hope this helped.
by Jessica Manriquez 1H
Thu Oct 08, 2020 1:50 am
Forum: Student Social/Study Group
Topic: Office Hours
Replies: 7
Views: 59

Re: Office Hours

I agree with the previous posts; you don't necessarily have to arrive with a question ready, its very helpful to hear other student's questions which could clarify any of your own questions. Sometimes people stray away from attending OH because they feel as though they need to have questions ready t...

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