Search found 30 matches

by jmtz1I
Sun Dec 01, 2019 11:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Numbers and Ligands
Replies: 3
Views: 30

Re: Coordination Numbers and Ligands

The coordination number means the number of bonds on the central atom.
by jmtz1I
Sun Dec 01, 2019 11:23 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining Coordination number
Replies: 1
Views: 26

Determining Coordination number

How do you determine the coordination number if we aren't given a ligand?
by jmtz1I
Sun Dec 01, 2019 9:00 pm
Forum: Hybridization
Topic: Hybridization
Replies: 7
Views: 84

Re: Hybridization

I think that should be it. Lavelle didn't go over anything else for hybridization.
by jmtz1I
Sun Dec 01, 2019 8:44 pm
Forum: Naming
Topic: Final Exam?
Replies: 20
Views: 197

Re: Final Exam?

It will be a cumulative final but I believe that it will focus more on the topics we learned after test 2!
by jmtz1I
Sun Dec 01, 2019 8:37 pm
Forum: Student Social/Study Group
Topic: Final Studying
Replies: 8
Views: 98

Re: Final Studying

I typically watch the organic chemistry tutor or khan academy depending on the topic.
by jmtz1I
Sun Nov 24, 2019 11:30 pm
Forum: Student Social/Study Group
Topic: Any tips on how to catch up in this class?
Replies: 16
Views: 178

Re: Any tips on how to catch up in this class?

I would say doing the homework problems from the outlines, as well as going over testing material, attending plf/step-up sessions. I also love watching youtube videos because they guide you through the material.
by jmtz1I
Sun Nov 24, 2019 11:27 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE Format
Replies: 34
Views: 220

Re: AXE Format

I don't think it matters. I've seen people do both, in my plf sessions they do use the subscript though.
by jmtz1I
Sun Nov 24, 2019 11:25 pm
Forum: Administrative Questions and Class Announcements
Topic: final exam
Replies: 9
Views: 136

Re: final exam

I would say more than the midterm but just to be sure you can also email your TA or check out the class website.
by jmtz1I
Sun Nov 24, 2019 11:22 pm
Forum: Resonance Structures
Topic: Resonance and Naming
Replies: 11
Views: 217

Re: Resonance and Naming

No, it shouldn't.
by jmtz1I
Sun Nov 24, 2019 11:18 pm
Forum: Hybridization
Topic: hybridization number
Replies: 5
Views: 47

Re: hybridization number

Yes, you do count it because it is an area of electron density.
by jmtz1I
Sun Nov 17, 2019 10:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE Formula
Replies: 4
Views: 51

Re: AXE Formula

From what I've learned in PLF sessions, doing the lewis structures seems to be the best way.
by jmtz1I
Sun Nov 17, 2019 10:36 pm
Forum: Student Social/Study Group
Topic: Test 2
Replies: 11
Views: 117

Re: Test 2

Lavelle said that Hybridization was not going to be on test 2. From what I remember the topics for test 2 will be intermolecular forces, hydrogen bonding, and molecular geometry. He also stated that sigma and pi bonds will be included as he will go over it during Monday's lecture.
by jmtz1I
Sun Nov 17, 2019 10:14 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 10
Views: 70

Re: Lone Pairs

Lone pairs repel; therefore, compressing and causing the angle to become smaller. For example, H2O has one lone pair that causes a bent shape with an angle less than 109.5.
by jmtz1I
Sun Nov 17, 2019 10:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vsepr angles
Replies: 10
Views: 69

Re: vsepr angles

Yes! I recommend creating a quizlet with electronic geometry, molecular geometry, and bond angles.
by jmtz1I
Sun Nov 17, 2019 10:08 pm
Forum: Hybridization
Topic: Test 2
Replies: 11
Views: 120

Re: Test 2

On Friday, Lavelle said that Hybridization was not going to be on test 2. From what I remember the topics for test 2 will be intermolecular forces, hydrogen bonding, and molecular geometry.
by jmtz1I
Sun Nov 03, 2019 11:50 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge
Replies: 16
Views: 142

Re: Formal charge

The best thing is to have a formal charge of 0, but if not my TA stated to find the lowest possible charge.
by jmtz1I
Sun Nov 03, 2019 11:44 pm
Forum: Bond Lengths & Energies
Topic: Short bond lengths vs long bond lengths
Replies: 6
Views: 61

Re: Short bond lengths vs long bond lengths

Shorter bond lengths are stronger because the atoms are closer to each other, therefore making it hard to break them apart. On the other hand, long bond lengths are weaker as they are farther apart.
by jmtz1I
Sun Nov 03, 2019 11:36 pm
Forum: Electronegativity
Topic: electronegativity trend
Replies: 9
Views: 77

Re: electronegativity trend

Electronegativity decreases as we go down a column because the distance between the nucleus and the electrons increases, meaning that the electrons are far from the nucleus.
by jmtz1I
Sun Nov 03, 2019 11:19 pm
Forum: Properties of Electrons
Topic: Photoelectric effect
Replies: 5
Views: 207

Re: Photoelectric effect

I would recommend watching Lavelle's video on the photoelectric effect on the website. https://lavelle.chem.ucla.edu/wp-conten ... t.wmv.html
by jmtz1I
Sun Nov 03, 2019 11:17 pm
Forum: Lewis Structures
Topic: central atom
Replies: 16
Views: 221

Re: central atom

The atom with the least electronegativity is the one that is the central atom.
by jmtz1I
Sun Oct 27, 2019 11:42 pm
Forum: Ionic & Covalent Bonds
Topic: Mnemonics for the period table trends
Replies: 3
Views: 26

Mnemonics for the period table trends

Y'all know of any mnemonics for the periodic table trends? to help remember the trends across the table? thank youuuu
by jmtz1I
Sun Oct 27, 2019 11:39 pm
Forum: Lewis Structures
Topic: Choosing the central atom
Replies: 16
Views: 158

Re: Choosing the central atom

From what Lavelle said, you should pick the atom with the lowest ionization energy to be the central atom.
by jmtz1I
Sun Oct 27, 2019 11:37 pm
Forum: Lewis Structures
Topic: Lewis symbols
Replies: 5
Views: 49

Re: Lewis symbols

There should be a total of 8 valence electrons. As they stated, the octet rule.
by jmtz1I
Sun Oct 27, 2019 11:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 2
Views: 33

Re: Midterm

I think he's going to tell us more about it tomorrow during lecture.
by jmtz1I
Sun Oct 27, 2019 11:27 pm
Forum: Student Social/Study Group
Topic: Week 5 Homework
Replies: 1
Views: 59

Re: Week 5 Homework

I think that any problem going over the topics we're learning at the moment is acceptable and the ones they give us on the oulines. If anything just email your TA :)
by jmtz1I
Sun Oct 20, 2019 11:42 pm
Forum: Photoelectric Effect
Topic: Work Function
Replies: 9
Views: 137

Re: Work Function

I've noticed that Lavelle uses those two terms interchangeably as well. But in my plf session, they described work function as the energy needed to remove an electron from a solid surface.
by jmtz1I
Sun Oct 20, 2019 11:39 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Homework 1A.9
Replies: 1
Views: 37

Homework 1A.9

having trouble understanding how we're supposed to start in order to solve. 1A. 9 "A college student recently had a busy day. Each of the student’s activities on that day (reading, having a dental x-ray, making popcorn in a microwave oven, and getting a suntan) involved radiation from a differe...
by jmtz1I
Sun Oct 20, 2019 11:36 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration and orbital diagram
Replies: 1
Views: 23

Electron Configuration and orbital diagram

Can someone please explain how the orbital diagram works? As in the arrows and how we know if it spins up/down? thank you so much!
by jmtz1I
Sun Oct 20, 2019 11:24 pm
Forum: Properties of Light
Topic: homework 1A.3
Replies: 8
Views: 97

Re: homework 1A.3

I like to always remember that they have an inverse relationship. So if the wavelength is short, frequency is high and vice versa (long wavelength=low frequency)
by jmtz1I
Sun Oct 20, 2019 11:16 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 58
Views: 1315

Re: Advice for studying

I would definitely recommend going to plf sessions or the step-up sessions they hold at covel. Also, just planning your day and finding time to just study on Chem is essential.

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