Search found 45 matches

by Claudia_Danysh_2C
Fri Nov 27, 2020 1:37 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

Want to hear a joke about element 116? Uuh...
by Claudia_Danysh_2C
Fri Nov 27, 2020 1:36 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

I try to tell chemistry jokes, but sometimes there's no reaction
by Claudia_Danysh_2C
Wed Nov 25, 2020 11:08 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination number
Replies: 9
Views: 29

Coordination number

So I know the coordination number is the number of bonds, but do we count one or two bonds when were looking at a double bond for coordination number? I know a double bond is two individual bonds so I think we count two but I just wanted to make sure!
by Claudia_Danysh_2C
Mon Nov 23, 2020 1:29 pm
Forum: Hybridization
Topic: Confusion on Lavelle's example from today's lecture [ENDORSED]
Replies: 2
Views: 55

Re: Confusion on Lavelle's example from today's lecture [ENDORSED]

Yes to your first question, there is a pi bond in ethene as well as three sigma bonds so we can't fill the 2sp2 orbital with four electrons and that final electron has to go to the 2p orbital that is unhybridized. The hybridization doesn't actually change, the hybridization should always be sp2 for...
by Claudia_Danysh_2C
Mon Nov 23, 2020 12:59 pm
Forum: Hybridization
Topic: Confusion on Lavelle's example from today's lecture [ENDORSED]
Replies: 2
Views: 55

Confusion on Lavelle's example from today's lecture [ENDORSED]

Hey guys, so I was following Lavelle's lecture but then I got confused when he started explaining hybridization on ethene. So, I understand that we made three hybrid orbitals because the carbon has sp2 hybridization in ethene. I'm also pretty sure that we put the fourth valence electron in 2p instea...
by Claudia_Danysh_2C
Sun Nov 22, 2020 12:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Remembering Molecular Shapes
Replies: 4
Views: 28

Remembering Molecular Shapes

Does anyone have any tips for remembering molecular shapes? I looked up charts online and was just wondering if anybody has any advice!
by Claudia_Danysh_2C
Sun Nov 22, 2020 12:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

I would make a chemistry joke, but I heard the good ones Argon
by Claudia_Danysh_2C
Sun Nov 22, 2020 12:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

I don't trust atoms...I heard that they make up everything!
by Claudia_Danysh_2C
Sun Nov 22, 2020 12:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair E-
Replies: 47
Views: 155

Re: Lone Pair E-

Lone pair electrons do count as their own area of electron density!
by Claudia_Danysh_2C
Sun Nov 22, 2020 11:46 am
Forum: Sigma & Pi Bonds
Topic: Sigma and Pi Bonds
Replies: 6
Views: 29

Sigma and Pi Bonds

So I'm trying to sort out my understanding and was wondering if somebody could tell me if this is right. So, a single bond is a sigma bond and that a double bond is one sigma and one pi bond, but a double bond is also just called a pi bond even though its one pi bond and one sigma bond. Right?
by Claudia_Danysh_2C
Mon Nov 16, 2020 1:20 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cr and Cu as exceptions
Replies: 2
Views: 18

Cr and Cu as exceptions

Hi guys, so I know that Cr and Cu are exceptions because you have a half-filled 4s orbital in both, but am wondering if this pattern follow for elements that are in the same column as Cr and Cu? For example, since Cr is [Ar](3d^5)(4s^1), is Mo [Kr](4d^5)(5s^1) so that it follows the same pattern as ...
by Claudia_Danysh_2C
Sat Nov 14, 2020 9:11 am
Forum: Dipole Moments
Topic: Polar covalent bonds
Replies: 5
Views: 17

Re: Polar covalent bonds

It helps me to distinguish these by knowing that you need two polar covalent molecules to have one dipole-dipole interaction!
by Claudia_Danysh_2C
Sat Nov 14, 2020 9:08 am
Forum: Electronegativity
Topic: Dipole Moments in Molecules
Replies: 4
Views: 24

Re: Dipole Moments in Molecules

In short, yes because the atoms have to have opposite charges to be attracted to each other which ultimately means a partial positive and negative charged side when the two atoms bond!
by Claudia_Danysh_2C
Sat Nov 14, 2020 9:07 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hydrogen bonding why it works?
Replies: 4
Views: 23

Re: Hydrogen bonding why it works?

Just adding on to this...I used to get confused about this also but it helps me to remember that hydrogen bonds aren't actually bonds because we even draw them differently in diagrams. Whereas we draw a straight line for a single, double, or triple bond, we draw multiple short lines ( ex: | | | ) to...
by Claudia_Danysh_2C
Sat Nov 14, 2020 9:02 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Order of Intermolecular Forces
Replies: 5
Views: 29

Re: Order of Intermolecular Forces

Hi! So the order from weakest to strongest intermolecular forces are as follows: London Dispersion Forces < Dipole-Dipole < Hydrogen Bonding < Ion-Dipole The difference between dipole-dipole and dipole-induced dipole is dipole-dipole is present with polar molecules verses dipole-induced dipole (or ...
by Claudia_Danysh_2C
Fri Nov 13, 2020 4:35 pm
Forum: Electronegativity
Topic: Electronegativity: O v. Cl
Replies: 3
Views: 12

Electronegativity: O v. Cl

Hey guys, I know that electronegativity increases as you go up and to the right, but I'm confused on which matters more...the higher you are in the periodic table...or the further right you are in the periodic table. For example, would oxygen or chlorine be more electronegative?
by Claudia_Danysh_2C
Fri Nov 13, 2020 4:33 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

Q: Why was the mole of oxygen molecules excited when he walked out of the bar?

A: Because he got Avogadro's number!
by Claudia_Danysh_2C
Sun Nov 08, 2020 10:08 pm
Forum: Dipole Moments
Topic: Hydrogen Bonding
Replies: 20
Views: 483

Re: Hydrogen Bonding

Yes, only those three atoms! But they also have to have a partial negative charge.
by Claudia_Danysh_2C
Sun Nov 08, 2020 10:07 pm
Forum: Resonance Structures
Topic: Bond lengths
Replies: 20
Views: 90

Re: Bond lengths

Hi! No you don't because the way you can denote a double bond is by drawing two shared bond lines instead of one!
by Claudia_Danysh_2C
Sun Nov 08, 2020 10:05 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 40
Views: 1400

Re: Noble Gases

They are not included and no, fluorine is the most electronegative atom!
by Claudia_Danysh_2C
Sun Nov 08, 2020 10:04 pm
Forum: Resonance Structures
Topic: Electron spin
Replies: 12
Views: 42

Re: Electron spin

Hey, I don't know if there is actually a way to tell other than looking at the periodic table and identifying which column the atom is in and which spin that column correlates to in spin!
by Claudia_Danysh_2C
Sun Nov 08, 2020 10:00 pm
Forum: Lewis Structures
Topic: lewis structure
Replies: 17
Views: 44

Re: lewis structure

Usually, you can know by identifying what the overall charge of the atom is!
by Claudia_Danysh_2C
Sun Nov 08, 2020 5:50 pm
Forum: Trends in The Periodic Table
Topic: Period Trends
Replies: 8
Views: 37

Re: Period Trends

Hey guys, I get really confused when I'm thinking about trends in the periodic table and was wondering if anyone has any tricks/advice for making them easier to remember?
by Claudia_Danysh_2C
Sun Nov 01, 2020 6:12 pm
Forum: Lewis Structures
Topic: Dot order
Replies: 11
Views: 85

Re: Dot order

Ya usually I fill in the dots by only putting one on each side and then going around a second time so you I the right number of paired and unpaired electrons!
by Claudia_Danysh_2C
Sun Nov 01, 2020 6:10 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 78
Views: 49096

Re: How to find my posts

alebenavides wrote:is there a way to know if we've posted in a section already ?


I don't think there is!
by Claudia_Danysh_2C
Sun Nov 01, 2020 6:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation Points [ENDORSED]
Replies: 62
Views: 909

Re: Participation Points [ENDORSED]

I think we do get points for every post we make. I don't think we can actually see how many points we have but ya I think if you only submitted three posts instead of 5 you would get partial credit but I'm not sure.
by Claudia_Danysh_2C
Sat Oct 31, 2020 5:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

Why can you never trust an atom?

Because they make up everything!
by Claudia_Danysh_2C
Sun Oct 25, 2020 6:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 226
Views: 116324

Re: Advice from a Medical Student [ENDORSED]

This post has guided me during this quarter. I've been doing everything you said and I feel comfortable with the material and ready for the midterm!
by Claudia_Danysh_2C
Sun Oct 25, 2020 6:27 pm
Forum: Administrative Questions and Class Announcements
Topic: How to list Chem_Mod posts
Replies: 18
Views: 40130

Re: How to list Chem_Mod posts

Thank you this actually saved me so much time!
by Claudia_Danysh_2C
Sun Oct 25, 2020 6:26 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1440277

Re: Post All Chemistry Jokes Here

Doctor to patient: You're low on Magnesium
Me: 0mg
by Claudia_Danysh_2C
Sun Oct 25, 2020 6:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 191
Views: 14425

Re: Advice from a Medical Student - Part II [ENDORSED]

Reading this post was so motivating for me because I also want to go to medical school. Thinking about the road to getting there is super intimidating and reading what you had to say made me realize that even though it's tough, its a long process that will prepare me for the future!
by Claudia_Danysh_2C
Sun Oct 25, 2020 6:22 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 190
Views: 34602

Re: Final Jitters

Hi Marina! First, I want to say that everybody is also nervous to some extent and that you're not alone! :) One of the main things that helps me to not be so nervous is honestly to just study the material until I feel comfortable with it. One of the reasons why I get anxiety about school is that I f...
by Claudia_Danysh_2C
Sun Oct 18, 2020 7:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Where can I buy a webcam for a reasonable price?
Replies: 60
Views: 942

Re: Where can I buy a webcam for a reasonable price?

Hey, my TA sent out an email this week saying that we can use our phone camera instead of having to use a separate webcam! I would probably reach out to your TA first though to make sure!
by Claudia_Danysh_2C
Sun Oct 18, 2020 6:41 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 196
Views: 891

Re: How are you studying?

Hi! So basically, I watch the lectures and then do the problems in discussion. If I realize I'm having trouble understanding a topic covered during a lecture or trouble answering a practice question from discussion section on my own, I either watch the lecture again or try to understand why we appro...
by Claudia_Danysh_2C
Sun Oct 18, 2020 6:39 pm
Forum: Photoelectric Effect
Topic: When are electrons excited vs ejected
Replies: 16
Views: 118

Re: When are electrons excited vs ejected

Hi! So my understanding is that an electron is excited when it receives energy from an incoming photon and because of this is "excited," ultimately making the electron jump to a higher energy level. Sometimes, when this energy from an incoming photon is high enough, the electron is so &quo...
by Claudia_Danysh_2C
Sun Oct 18, 2020 6:36 pm
Forum: Properties of Electrons
Topic: Mass conservation in atomic spectra experiments?
Replies: 2
Views: 13

Mass conservation in atomic spectra experiments?

Hey guys, I know Dr. Lavelle has been explaining how the law of conservation of mass connects to different topics we're covering but I'm struggling to connect it to when an electron is so excited that it ultimately ends up "disconnecting" from the nucleus of an atom. Does anyone have any i...
by Claudia_Danysh_2C
Sun Oct 18, 2020 6:34 pm
Forum: Properties of Electrons
Topic: Light Emission
Replies: 4
Views: 40

Light Emission

Hey guys, I don't think this is something that we need to know but since different photons can make electrons jump to different energy levels that eventually end up returning to ground state, is there a correlation between the color of light that is emitted and the energy of the photon? I know this ...
by Claudia_Danysh_2C
Sun Oct 11, 2020 4:00 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Preference on Scientific Notation
Replies: 11
Views: 97

Re: Preference on Scientific Notation

I don't think that there's a preference in which form you use. Either should be good in my opinion as long as you make sure that you're being careful when you're using that notation when doing calculations!
by Claudia_Danysh_2C
Sun Oct 11, 2020 3:55 pm
Forum: Significant Figures
Topic: When should I start looking at sig figs?
Replies: 18
Views: 103

Re: When should I start looking at sig figs?

I would also say that you should really only worry about sig figs when you're writing down your final answer. I keep every decimal that I can in between calculations since that helps me be more accurate and then once I'm at my answer, I make sure my final answer and the numbers used in the question ...
by Claudia_Danysh_2C
Sun Oct 11, 2020 3:53 pm
Forum: SI Units, Unit Conversions
Topic: Correct Units for Chem Problems
Replies: 3
Views: 33

Correct Units for Chem Problems

Which units should we use when including temperature in a chem problem? My roommate said that the unit that you should use for temperature depends on the type of problem you're looking at, is that true?
by Claudia_Danysh_2C
Sun Oct 11, 2020 3:48 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Calculating number of moles of an element
Replies: 10
Views: 61

Re: Calculating number of moles of an element

I also think that we pretend we have 100 grams in total because it makes the calculations easier because when you're first learning how to figure out empirical and molecular formulas, pretending that there are 100 grams in total just makes it easier to approach each problem since you start each prob...
by Claudia_Danysh_2C
Sun Oct 11, 2020 3:44 pm
Forum: Limiting Reactant Calculations
Topic: How do we find the amount of oxygen in combustion?
Replies: 10
Views: 506

Re: How do we find the amount of oxygen in combustion?

Since we know that mass is conserved in chemical reactions because of the Law of the Conservation of Mass, you can determine the amount of oxygen in combustion by looking at a balanced chemical equation that involves combustion and determining how many number of moles of oxygen there are to begin wi...

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