Search found 41 matches

by Karen Elrayes 1L
Wed Dec 02, 2020 1:58 pm
Forum: Lewis Structures
Topic: Lone Pair placement
Replies: 3
Views: 12

Lone Pair placement

Why is it okay for the lone pairs to be drawn next to each other in H20 but they have to be opposite each other in XeF4
by Karen Elrayes 1L
Sun Nov 29, 2020 10:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair E-
Replies: 47
Views: 155

Re: Lone Pair E-

Lone pairs have their own electrical density kind of like a bubble around them that causes repulsion
by Karen Elrayes 1L
Sun Nov 29, 2020 10:53 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 12
Views: 79

Re: Sig Figs

We don't really need sig figs currently because it is multiple-choice, but it is helpful to know for the future
by Karen Elrayes 1L
Sun Nov 29, 2020 10:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Equatorial/ Axial Planes
Replies: 14
Views: 33

Re: Equatorial/ Axial Planes

Equatorial is kind of like the equator of the earth so it would help you visualize that they are the bonds on the horizal planes and axial are like the axis of the earth
by Karen Elrayes 1L
Sun Nov 29, 2020 10:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shape Names
Replies: 50
Views: 181

Re: Shape Names

It would be considered bent
by Karen Elrayes 1L
Sun Nov 29, 2020 10:48 pm
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 45
Views: 336

Re: Tips for Staying Focused

Try to plan one day where you don't do anything school-related so you feel refreshed and ready to work throughout the week
by Karen Elrayes 1L
Sun Nov 29, 2020 10:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Resonance Structure Definition
Replies: 9
Views: 28

Re: Resonance Structure Definition

Whenever there is more than one way to draw a structure by moving around the bonds, we have resonance
by Karen Elrayes 1L
Sun Nov 29, 2020 10:18 pm
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 45
Views: 336

Re: Tips for Staying Focused

I honestly feel like it's best to write down everything you need to do for the week for all your classes and things you need to do outside of school. Writing them down makes you feel less overwhelmed and more motivated to finished one thing at a time. It helps focus your mind
by Karen Elrayes 1L
Sun Nov 29, 2020 10:07 pm
Forum: Sigma & Pi Bonds
Topic: Sapling Q #16
Replies: 13
Views: 43

Re: Sapling Q #16

After drawing the lewis structures, see which ones have resonance and those will be the ones that are delocalized.
by Karen Elrayes 1L
Sun Nov 29, 2020 4:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Required knowledge for test/midterm [ENDORSED]
Replies: 17
Views: 646

Re: Required knowledge for test/midterm [ENDORSED]

Does anyone know if we can view the questions we got wrong on the midterm?
by Karen Elrayes 1L
Fri Nov 20, 2020 12:59 am
Forum: Lewis Structures
Topic: Ionic Lewis Structures
Replies: 2
Views: 18

Re: Ionic Lewis Structures

Is there a specific way to draw the lewis structures for ionic compounds instead of covalent?
by Karen Elrayes 1L
Sat Nov 14, 2020 11:35 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 19
Views: 65

Re: Resonance

Ahh yes that makes a lot more sense thank you
by Karen Elrayes 1L
Sat Nov 14, 2020 10:14 pm
Forum: Lewis Structures
Topic: dipole dipole intermolecular forces
Replies: 4
Views: 23

dipole dipole intermolecular forces

How can we compare or determine the strength of a dipole - dipole intermolecular force
by Karen Elrayes 1L
Sat Nov 14, 2020 9:38 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 19
Views: 65

Re: Resonance

also why are resonance structures more stable?
by Karen Elrayes 1L
Sat Nov 14, 2020 9:16 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 19
Views: 65

Re: Resonance

What is x-ray diffraction again?
by Karen Elrayes 1L
Wed Nov 11, 2020 9:56 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm 2
Replies: 6
Views: 48

Midterm 2

Hey everyone, did professor Lavelle specify the cut off for the material on midterm 2?
by Karen Elrayes 1L
Sun Nov 08, 2020 2:22 pm
Forum: Electronegativity
Topic: Atom size
Replies: 22
Views: 737

Re: Atom size

"Electronegativity is the tendency of the atoms of an element to attract electrons when they are chemically combined with another element." So electronegativity deals with electrons from other atoms and not itself which is why it doesn't affect atom size. But as the rest of the posts said ...
by Karen Elrayes 1L
Sun Nov 08, 2020 2:17 pm
Forum: Lewis Structures
Topic: Lone Pairs Question
Replies: 22
Views: 92

Re: Lone Pairs Question

Adding on to the rest of the posts, Lone pairs do not participate in bonding like everyone is saying but also they will help you keep count of all valence electrons. They are basically the valence electrons that aren't bonded with another element.
by Karen Elrayes 1L
Sun Nov 08, 2020 2:15 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14BL?
Replies: 7
Views: 48

Re: Chem 14BL?

My friend is currently taking chem 14B and 14BL together and she said it was very doable. But when you are enrolling you have to enroll in 14B in ur first pass and 14BL in ur second pass for it to let you enroll.
by Karen Elrayes 1L
Sun Nov 08, 2020 2:14 pm
Forum: Properties of Light
Topic: Study Advice
Replies: 50
Views: 196

Re: Study Advice

In my opinion, going to step-up sessions, workshops is in itself self-study and preparing for the exam because that is where you will probably find out what you don't know as well as where you commonly make mistakes. I highly recommend going to at least 1 or 2 per week.
by Karen Elrayes 1L
Sun Nov 08, 2020 2:08 pm
Forum: Octet Exceptions
Topic: Octet rule
Replies: 9
Views: 31

Re: Octet rule

The exceptions H, He, Li, Be are exceptions because they tend to gain an electron or lose electrons to reach the s subshell meaning they are going to usually have 2 electrons in their outermost shell instead of the 8 which is what the octet rule suggests.
by Karen Elrayes 1L
Sun Nov 01, 2020 7:59 pm
Forum: Properties of Light
Topic: Midterm Question
Replies: 11
Views: 144

Re: Midterm Question

We don't need to do any problems from section topic 1C right?
by Karen Elrayes 1L
Sun Nov 01, 2020 7:57 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 78
Views: 49124

Re: How to find my posts

Has anyone experienced an issue with the number of the posts it says we posted on the right? Because everytime I post it says its one post greater than how many I've actually posted
by Karen Elrayes 1L
Thu Oct 29, 2020 2:55 pm
Forum: Properties of Electrons
Topic: Absorption and emission spectrum
Replies: 4
Views: 40

Re: Absorption and emission spectrum

For the equation En= -hR/n^2 does the En represent the energy of an electron at the n energy level? and would that be equal to the energy of the light that excited that electron?
by Karen Elrayes 1L
Thu Oct 29, 2020 12:21 am
Forum: Properties of Light
Topic: Midterm Question
Replies: 11
Views: 144

Re: Midterm Question

Do we need to know atomic and ionic radius trends for the midterm?
by Karen Elrayes 1L
Wed Oct 28, 2020 3:53 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation Confusion
Replies: 9
Views: 56

Re: Rydberg Equation Confusion

so is n1 actually n final? and n2 n intial?
by Karen Elrayes 1L
Mon Oct 26, 2020 12:53 am
Forum: Significant Figures
Topic: sig fig
Replies: 14
Views: 76

Re: sig fig

Do you guys think we need sig figs since it's a multiple choice exam for this midterm
by Karen Elrayes 1L
Sun Oct 25, 2020 4:52 pm
Forum: Properties of Light
Topic: Electric Field (visualization)
Replies: 2
Views: 21

Re: Electric Field (visualization)

Light is a form of electromagnetic radiation, which consists of oscillating electric and magnetic fields that travel through empty space. As a light ray passes an electron (charged particle), its electric field pushes the electron first in one direction and then the opposite direction repeatedly, m...
by Karen Elrayes 1L
Sun Oct 25, 2020 2:19 pm
Forum: Properties of Light
Topic: Electric Field (visualization)
Replies: 2
Views: 21

Electric Field (visualization)

What does it mean that an electric field pushes on charged particles causing them to oscillate? Like what does that apply to in what we have learned so far?
by Karen Elrayes 1L
Wed Oct 21, 2020 2:14 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 11
Views: 103

Re: Rydberg Equation

does anyone know what equations/values we should have memorized that aren't on the equation sheet?
by Karen Elrayes 1L
Wed Oct 21, 2020 1:09 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 11
Views: 103

Re: Rydberg Equation

How do we derive the Rydberg equation?
by Karen Elrayes 1L
Sat Oct 17, 2020 12:31 am
Forum: Administrative Questions and Class Announcements
Topic: Built-in webcams/Equipment request [ENDORSED]
Replies: 22
Views: 710

Re: Built-in webcams/Equipment request [ENDORSED]

You definitely don't need to buy an external webcam. You can use ur phone to zoom and that will show ur workspace. It would be difficult to use ur computer webcam because you will be taking the exam on the computer and so you can't bend the laptop to show your workspace at the same time.
by Karen Elrayes 1L
Sat Oct 17, 2020 12:26 am
Forum: Photoelectric Effect
Topic: Sapling homework
Replies: 2
Views: 45

Sapling homework

Just to clarify, the homeworks on sapling for week 2-4 are due week 4?
by Karen Elrayes 1L
Tue Oct 13, 2020 11:31 pm
Forum: SI Units, Unit Conversions
Topic: Nomenclature
Replies: 7
Views: 68

Re: Nomenclature

That's very reassuring thank you! I personally read through that chapter in the textbook and I know the basics of everything just don't have some memorized so I'm glad professor Lavelle isn't focused on us memorizing things.
by Karen Elrayes 1L
Tue Oct 13, 2020 10:46 am
Forum: SI Units, Unit Conversions
Topic: Nomenclature
Replies: 7
Views: 68

Nomenclature

How well do you guys think we should know all the nomenclature? Did you guys read through that chapter in sapling or take notes and flashcards and such?
by Karen Elrayes 1L
Mon Oct 12, 2020 3:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Discussion
Replies: 6
Views: 46

Re: Chemistry Discussion

Has anyone attended Dr. Lavell's office hours on Monday or Wednesday? Because I'm trying to join but I'm just stuck in the waiting room for quite a while. How do they work? Are we supposed to wait our turn or is it a discussion for everyone?
by Karen Elrayes 1L
Fri Oct 09, 2020 4:03 am
Forum: Student Social/Study Group
Topic: Sapling Week One Homework Question
Replies: 9
Views: 87

Re: Sapling Week One Homework Question

Are we able to redo the homework problems in sapling? Like are we given multiple tries?
by Karen Elrayes 1L
Fri Oct 09, 2020 4:01 am
Forum: General Science Questions
Topic: Workshops
Replies: 2
Views: 71

Workshops

Has anyone been to a workshop for this week? How are they structured? Like do we have worksheets to complete and like new problems or do have to bring our own question for it to be answered?
by Karen Elrayes 1L
Fri Oct 09, 2020 3:59 am
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4430

Re: Step Up Sessions

Where can I find the schedule and the zoom links for the step up sessions?
by Karen Elrayes 1L
Thu Oct 08, 2020 1:41 am
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 156
Views: 105661

Re: Reading the textbook [ENDORSED]

Also are you guys reading all the fundamentals or only the ones recommended in the syllabus?
by Karen Elrayes 1L
Thu Oct 08, 2020 1:40 am
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 156
Views: 105661

Re: Reading the textbook [ENDORSED]

How is everyone going about reading the textbook? Are you guys taking notes while reading? Just reading through it and doing the problems?

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