Search found 53 matches

by YUNALEE
Thu Dec 10, 2020 10:00 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1266

Re: How are you studying?

I read through the textbook sessions, do the practice problems and read through notes
by YUNALEE
Thu Dec 10, 2020 9:59 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 18
Views: 107

Re: Final

In my midterms it was always 2 or 3 from the textbook so we should try to look over them before :)
by YUNALEE
Thu Dec 10, 2020 9:58 pm
Forum: Student Social/Study Group
Topic: Studying
Replies: 13
Views: 92

Re: Studying

And if you have a AP chemistry review book from hs that works too!!
by YUNALEE
Thu Dec 10, 2020 9:57 pm
Forum: Student Social/Study Group
Topic: Anxiety
Replies: 36
Views: 198

Re: Anxiety

just remind yourself it's almost over hahahah
and that this is one quarter over many many more to come, we will adapt and persevere
by YUNALEE
Thu Dec 10, 2020 9:56 pm
Forum: Student Social/Study Group
Topic: PUSH THROUGH!!
Replies: 29
Views: 152

Re: PUSH THROUGH!!

I definitely feel the burn out but we can do it!! good luck guys!!
by YUNALEE
Sat Dec 05, 2020 11:41 pm
Forum: Student Social/Study Group
Topic: Point distribution
Replies: 11
Views: 102

Point distribution

So if we were taking this class in person, we would have a midterm, a couple tests, final and everything else we have now. On the tests, since it would be an in person written test it was a longer test with many questions, students were able to get partial credit on every test. Now, we don't have an...
by YUNALEE
Sat Dec 05, 2020 11:37 pm
Forum: Student Social/Study Group
Topic: Evaluations
Replies: 17
Views: 90

Evaluations

Do we get extra credit for completing the course evaluations for this class?
by YUNALEE
Sat Dec 05, 2020 11:35 pm
Forum: Student Social/Study Group
Topic: How are you?
Replies: 111
Views: 716

Re: How are you?

Will be better after finals
by YUNALEE
Sat Dec 05, 2020 11:34 pm
Forum: Student Social/Study Group
Topic: Week 8/9 Thoughts/Worries
Replies: 66
Views: 476

Re: Week 8/9 Thoughts/Worries

I think the point distribution is terrible overall, it's so much unnessesary stress in the midst of a global pandemic. I should be spending time with my family and friends, not being cooped up studying in my room 24/7 neglecting myself
by YUNALEE
Sat Dec 05, 2020 11:31 pm
Forum: Bronsted Acids & Bases
Topic: Acids strong vs not
Replies: 3
Views: 37

Acids strong vs not

so basically if the H is in the front of the molecular formula it's likely to lose so it's a strong acid and if it's at the end or middle, it's a weak acid?
by YUNALEE
Sun Nov 29, 2020 5:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent
Replies: 9
Views: 62

Re: Bent

they're both two attached atoms with a lone pair that causes the bent shape
by YUNALEE
Sun Nov 29, 2020 5:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: see-saw
Replies: 6
Views: 65

Re: see-saw

hi lily this is because of the lone pair
by YUNALEE
Sun Nov 29, 2020 5:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: sigma vs pi bonds
Replies: 33
Views: 184

Re: sigma vs pi bonds

I also saw in the textbook that side - side bonds are sigma and others are pi bonds
also, s in sigma signifies the s orbital and same w p in pi with the p orbital
by YUNALEE
Sun Nov 29, 2020 5:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angle Masterlist
Replies: 5
Views: 37

Re: Angle Masterlist

There's also some diagrams in the textbooks that are useful located in chapter 2F!
by YUNALEE
Sun Nov 29, 2020 5:46 pm
Forum: Hybridization
Topic: Definition of Hybridization
Replies: 5
Views: 59

Definition of Hybridization

What is hybridization, what does it tell us?
Is there an easier way to figure out the hybridization without lewis structures and just using electron configuration?
by YUNALEE
Sat Nov 21, 2020 7:02 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Character
Replies: 33
Views: 200

Re: Covalent Character

Smaller difference between electronegitivity values!
by YUNALEE
Sat Nov 21, 2020 6:59 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d fills before or after 4s?
Replies: 7
Views: 57

Re: 3d fills before or after 4s?

after, and you can also think about it in the order of the n number! 3 before 4 so 3d, 4s
by YUNALEE
Sat Nov 21, 2020 6:46 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration for Silver?
Replies: 8
Views: 67

Re: Electron Configuration for Silver?

You always want the configuration to be the most stable it can so you would want to fill all of the d subshell instead of having an incomplete d and s subshell!
by YUNALEE
Sat Nov 21, 2020 6:04 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configuration exceptions
Replies: 7
Views: 64

Re: Electron configuration exceptions

hi pretty girl
you always want the most stable version so you give the d orbital the 2 electrons it needs to become complete!
luv u
by YUNALEE
Sat Nov 21, 2020 6:03 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Transition Metal Electrons
Replies: 3
Views: 42

Re: Transition Metal Electrons

If it helps, put it in the order of the n number. For example you would put 3d before 4s!
And always try to half fill or full fill the d orbitals
by YUNALEE
Sat Nov 14, 2020 10:36 pm
Forum: Resonance Structures
Topic: Determining oxidation numbers?
Replies: 9
Views: 42

Re: Determining oxidation numbers?

Do we need to know oxidation numbers for the midterm? I didn't see it in the listed textbook readings
by YUNALEE
Tue Nov 10, 2020 5:31 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation number?
Replies: 8
Views: 77

Re: Oxidation number?

I went to his office hours on Monday and I believe he said he would talk more on oxidation numbers on Wednesday's lecture! From the textbook I learned that formal charges depend on lewis structures while oxidation numbers don't :)
by YUNALEE
Tue Nov 10, 2020 5:28 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Lowering Formal Charges
Replies: 7
Views: 58

Re: Lowering Formal Charges

Also keep in mind that ions have overall charges and that elements want to reach the noble gas configuration :)
by YUNALEE
Tue Nov 10, 2020 5:27 pm
Forum: Formal Charge and Oxidation Numbers
Topic: formal charge vs oxidation number
Replies: 3
Views: 30

Re: formal charge vs oxidation number

It also said in the textbook that formal charges depend on lewis structures while oxidation numbers don't
by YUNALEE
Tue Nov 10, 2020 5:15 pm
Forum: Formal Charge and Oxidation Numbers
Topic: 2.A.3
Replies: 3
Views: 29

Re: 2.A.3

Also remember that for transition metals you put d before the s subshell when writing them out!
by YUNALEE
Tue Nov 10, 2020 5:14 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 4
Views: 59

Re: Formal Charge

I also don't think that in terms of our next midterm we will have to distinguish between ones that are so similar. From what I've seen in the textbook problems there is an obvious difference in charges
by YUNALEE
Sat Nov 07, 2020 1:35 am
Forum: Ionic & Covalent Bonds
Topic: Electronegativity
Replies: 16
Views: 90

Re: Electronegativity

Fluorine has 7 valence electrons and wants to complete the octect so its electronegativity value is the highest at 3.8. The definition of electronegativity is the magnitude of how attracted valence electrons are. This explains why they all lose and gain electrons to become like the noble gases becau...
by YUNALEE
Sat Nov 07, 2020 1:31 am
Forum: Ionic & Covalent Bonds
Topic: Coulomb's PE
Replies: 3
Views: 16

Coulomb's PE

Do we need to know how to solve a problem that makes us use the Coulomb's potential energy formula? It's in the section of the textbook but I don't think Dr. Lavelle mentioned it in his lectures.
Thanks.
by YUNALEE
Wed Nov 04, 2020 4:04 pm
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 336

Re: Homework due date

This week and next week's sapling was posted today!
by YUNALEE
Wed Nov 04, 2020 3:58 pm
Forum: Ionic & Covalent Bonds
Topic: Different Bonds
Replies: 8
Views: 42

Re: Different Bonds

Covalent bond is sharing electrons and ionic is transferring electrons
by YUNALEE
Wed Nov 04, 2020 3:57 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Scores
Replies: 28
Views: 268

Re: Midterm Scores

I heard it was Thursday but I'm not sure what time, it'll probably be in the afternoon
by YUNALEE
Wed Nov 04, 2020 3:55 pm
Forum: Ionic & Covalent Bonds
Topic: London Dispersion Forces
Replies: 5
Views: 19

Re: London Dispersion Forces

He hasn't mentioned it in lecture yet but they're temporary attractions. I only remember that from AP chem so don't worry I'm sure he'll go over it!
by YUNALEE
Wed Nov 04, 2020 3:53 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic v. Covalent Bonds`
Replies: 10
Views: 59

Re: Ionic v. Covalent Bonds`

Think of it as covalent is sharing electrons because co
Ionic is transfer of electrons
by YUNALEE
Sat Oct 31, 2020 12:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4568

Re: Step Up Sessions

From what I heard, the UA worksheets were really helpful because they also gave out answer keys to review!
by YUNALEE
Sat Oct 31, 2020 11:59 am
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 88
Views: 456

Re: Is c always the speed of light?

Yes, it is because it is a constant!
by YUNALEE
Sat Oct 31, 2020 11:58 am
Forum: Properties of Light
Topic: How to remember what v is in equations
Replies: 46
Views: 258

Re: How to remember what v is in equations

if it is talking about physics like kinetic energy and has variables like mass, you know that it's velocity. If it gives you factors like wavelength, it's frequency.
by YUNALEE
Sat Oct 31, 2020 11:48 am
Forum: Properties of Light
Topic: Electromagnetic Spectrum
Replies: 7
Views: 70

Re: Electromagnetic Spectrum

Hi,
Also remember ROYGBIV!!
Hope that helps:)
by YUNALEE
Wed Oct 28, 2020 11:07 pm
Forum: Properties of Light
Topic: Need help on 1.16
Replies: 4
Views: 705

Re: Need help on 1.16

how did you get the 1.096776 × 10^7 number?
by YUNALEE
Mon Oct 19, 2020 12:13 pm
Forum: Properties of Light
Topic: Midterm
Replies: 42
Views: 390

Midterm

So do we have any information about the midterm?
I know it's covering materials from week 1-3 but is it multiple choice on CCLE and how many questions is it?
I'm guessing it's not open notes?
by YUNALEE
Mon Oct 19, 2020 12:10 pm
Forum: Properties of Light
Topic: calculating photons
Replies: 4
Views: 24

Re: calculating photons

The energy of a photon = threshold energy + kinetic energy
If you're given values any of these you can just plug it into the equation like the example from lecture 5
Hope this helped
by YUNALEE
Mon Oct 19, 2020 12:05 pm
Forum: Properties of Light
Topic: Photoelectric experiment
Replies: 3
Views: 20

Re: Photoelectric experiment

My TA said that as long as we know the gist of the levels of energy, wavelengths, frequency of the spectrum we should be okay!
by YUNALEE
Mon Oct 19, 2020 12:02 pm
Forum: Properties of Electrons
Topic: How do you calculate the wavelength of an electron without velocity?
Replies: 3
Views: 41

Re: How do you calculate the wavelength of an electron without velocity?

Also, just in case anyone had problems with this, put all the separate values in () in the calculator because the answers differ when you don't!
by YUNALEE
Mon Oct 19, 2020 12:01 pm
Forum: Properties of Light
Topic: Lecture 7
Replies: 5
Views: 23

Lecture 7

In today's lecture examples when Prof Lavelle said if there were measureable wavelike properties or not, what's the reason for it?
Is there a range where it is measureable?
Thanks
by YUNALEE
Wed Oct 14, 2020 9:35 pm
Forum: Properties of Light
Topic: Electrons and Magnetic Fields?
Replies: 3
Views: 54

Re: Electrons and Magnetic Fields?

That's a great question! Though I'm glad we don't have to go in depth about outside factors that delay expected behaviors.
Love your thought process, keep it up, you got this!!
by YUNALEE
Wed Oct 14, 2020 9:32 pm
Forum: Properties of Light
Topic: GroupMe
Replies: 2
Views: 47

Re: GroupMe

There is one! give me your username and I'll add you!
by YUNALEE
Wed Oct 14, 2020 9:31 pm
Forum: Properties of Light
Topic: Electron Falling Back Down the Energy Levels
Replies: 3
Views: 77

Re: Electron Falling Back Down the Energy Levels

I'm not sure if this is the correct answer to what you're asking but it's interesting you ask. I think it's important to keep in mind the fundamentals of energy levels when you're approaching this: as you get further away from the nucleus, the spaces are decreased and when you're closer to the nucle...
by YUNALEE
Wed Oct 14, 2020 9:27 pm
Forum: Properties of Light
Topic: work function
Replies: 15
Views: 142

Re: work function

and make sure to do the whole function at once instead of in steps! Another student and I did it in steps and it gave us a wrong output.
by YUNALEE
Wed Oct 14, 2020 7:25 pm
Forum: Properties of Light
Topic: Week 2 Lec 2
Replies: 4
Views: 36

Re: Week 2 Lec 2

I got it, don't do it step by step like me and plug it in all at once.
Not sure why this makes a difference but hah
thanks guys
by YUNALEE
Wed Oct 14, 2020 7:08 pm
Forum: Properties of Light
Topic: Week 2 Lec 2
Replies: 4
Views: 36

Week 2 Lec 2

In the first example, when I go to solve the equation instead of 551 x 10^-9 I get 5.51 x 10^-45
I know I'm doing it correctly so is my scientific calculator messing up the exponents?
Thanks guys
by YUNALEE
Wed Oct 07, 2020 9:16 pm
Forum: Empirical & Molecular Formulas
Topic: Sapling Question Number 8
Replies: 7
Views: 86

Re: Sapling Question Number 8

Hi!!
For that question I honestly just looked at the diagram, counted all the different elements and added up their molar masses!
by YUNALEE
Wed Oct 07, 2020 9:13 pm
Forum: Empirical & Molecular Formulas
Topic: Calculation Errors for Empirical Formulas
Replies: 10
Views: 67

Re: Calculation Errors for Empirical Formulas

I think 2.8 is close enough to the point you can round it to 3 if the rest of the equation makes sense but maybe try using exact numbers to calculate and not rounding during each step if you did that?
by YUNALEE
Wed Oct 07, 2020 9:10 pm
Forum: SI Units, Unit Conversions
Topic: Rounding in Between Steps [ENDORSED]
Replies: 22
Views: 202

Re: Rounding in Between Steps [ENDORSED]

I find it most helpful to use exact numbers in every step and round at the last step with the correct sig figs. It's easy to do this if you're using a scientific calculator and just copy and paste the longer numbers!
by YUNALEE
Wed Oct 07, 2020 9:08 pm
Forum: SI Units, Unit Conversions
Topic: Sapling Week 1 HW_problem #10
Replies: 8
Views: 108

Re: Sapling Week 1 HW_problem #10

Mine was saying that too! But I was using the wrong number for the actual so maybe look at that part again?

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