Search found 60 matches

by Matia Kim 1B
Sat Dec 08, 2018 6:10 pm
Forum: Hybridization
Topic: Power
Replies: 1
Views: 211

Power

Do we need to include the power in front of the hybridization? *C2sp2?
by Matia Kim 1B
Sat Dec 08, 2018 6:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent
Replies: 1
Views: 93

Bent

For the final, will we need to specify which bent shape we are referring to when answering? Would including the angle be enough?
by Matia Kim 1B
Sat Dec 08, 2018 6:04 pm
Forum: Electronegativity
Topic: Exceptions
Replies: 3
Views: 237

Exceptions

What are the electronegativity trend exceptions? What is the general trend?
by Matia Kim 1B
Fri Nov 30, 2018 3:29 pm
Forum: Electronegativity
Topic: Exceptions
Replies: 7
Views: 251

Exceptions

What are the exceptions in regards to the electronegativity pattern regarding the periodic table? Will we need to know these exceptions for the final?
by Matia Kim 1B
Fri Nov 30, 2018 3:22 pm
Forum: Dipole Moments
Topic: Molecular Geometry and polarity
Replies: 5
Views: 102

Re: Molecular Geometry and polarity

Depending on the electronegativity of the atoms or molecules, it should be a good indicator that it is nonpolar.
by Matia Kim 1B
Fri Nov 30, 2018 3:09 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi Bonds
Replies: 2
Views: 224

Sigma and Pi Bonds

Does a triple bond have 1 sigma bond and two pi bonds? Or is it 2 sigma bonds or something totally different?
by Matia Kim 1B
Mon Nov 19, 2018 4:15 pm
Forum: Hybridization
Topic: Class 11/19/2018
Replies: 1
Views: 54

Class 11/19/2018

In class today he said "number of unpaired electrons tells you how many...." can somebody finish this for me? I couldn't get if he said bonds or something else. Thank you
by Matia Kim 1B
Mon Nov 19, 2018 4:14 pm
Forum: Hybridization
Topic: Labeling Compounds
Replies: 4
Views: 81

Labeling Compounds

In class today he labeled methane (CH4) as C2sp^3 H1s. Why is it not 2sp^4 if there are four regions of electron density?
by Matia Kim 1B
Mon Nov 19, 2018 3:57 pm
Forum: Hybridization
Topic: What hybridization tells us
Replies: 2
Views: 74

What hybridization tells us

In class today, Dr. Lavelle said that hybridization does not tell us molecular shape/structure, but can it tell us bond angles?
by Matia Kim 1B
Fri Nov 16, 2018 5:01 pm
Forum: Hybridization
Topic: Energy Level
Replies: 2
Views: 113

Energy Level

Because we only write it out as SP2 instead of 2SP2, does that mean energy levels has no relation with hybridization? Would energy levels be needed if we were to go beyond 3 bonds?
by Matia Kim 1B
Fri Nov 16, 2018 4:45 pm
Forum: Hybridization
Topic: Sigma and Pi
Replies: 5
Views: 108

Sigma and Pi

Why is the first bond always going to be Sigma? and the second and third Pi? can there be more than 3?
by Matia Kim 1B
Fri Nov 16, 2018 4:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Planar vs Pyramidal
Replies: 5
Views: 118

Planar vs Pyramidal

Is there a difference between trigonal planar and trigonal pyramidal compounds? Is there a difference in their bond angles?
by Matia Kim 1B
Fri Nov 09, 2018 5:57 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 8
Views: 187

Electronegativity

What does it mean if an element is more electronegative than another?
by Matia Kim 1B
Fri Nov 09, 2018 5:56 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Octet Exceptions
Replies: 4
Views: 189

Octet Exceptions

With elements with exceptions in their classification like Copper and Chromium, does that change the number of valence electrons they produce?
by Matia Kim 1B
Fri Nov 09, 2018 5:55 pm
Forum: Dipole Moments
Topic: Dipole
Replies: 8
Views: 208

Dipole

In terms of drawing Lewis Structures, how does dipole moments effects the structure of an atom?
by Matia Kim 1B
Fri Nov 02, 2018 3:56 pm
Forum: Resonance Structures
Topic: Polar
Replies: 8
Views: 375

Polar

How do you know which resonance structure to use if they are polar? Is it always by lowest charge?
by Matia Kim 1B
Fri Nov 02, 2018 3:53 pm
Forum: Octet Exceptions
Topic: Boron and Aluminum
Replies: 2
Views: 79

Boron and Aluminum

Why are these two given exceptions for the Octet rule? Is it only these two?
by Matia Kim 1B
Fri Nov 02, 2018 3:52 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 11
Views: 283

Formal Charge

Can we determine an element/compound by formal charge alone?
by Matia Kim 1B
Sat Oct 27, 2018 12:13 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 5
Views: 143

Quantum Numbers

How do you know if the charge is positive 1/2 or negative 1/2?
by Matia Kim 1B
Sat Oct 27, 2018 12:13 pm
Forum: Quantum Numbers and The H-Atom
Topic: s,p,d,f
Replies: 8
Views: 296

s,p,d,f

Why does the number order change going from S to D? 4s to 3d instead of 4d?
by Matia Kim 1B
Sat Oct 27, 2018 12:11 pm
Forum: Quantum Numbers and The H-Atom
Topic: Orbitals
Replies: 4
Views: 120

Orbitals

What's the difference between the outer most orbital and shell? Is the shell now the outer most orbital?
by Matia Kim 1B
Thu Oct 18, 2018 5:10 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 2
Views: 111

Orbitals

Can someone explain to me how orbitals work? Why it starts with s but skips p and d for f? I am lost with this. Thanks!
by Matia Kim 1B
Thu Oct 18, 2018 5:02 pm
Forum: *Black Body Radiation
Topic: Black Body Radiation
Replies: 2
Views: 255

Black Body Radiation

To what extent are Black Bodies relevant in our everyday lives? Is this something that can only occur through manipulation or naturally?
by Matia Kim 1B
Thu Oct 18, 2018 4:59 pm
Forum: Properties of Light
Topic: Speed of Light
Replies: 5
Views: 181

Speed of Light

In terms of given variables (e.g. speed of light), how many significant figures is recommended to answer a problem?
by Matia Kim 1B
Fri Oct 12, 2018 2:33 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect Initial Purpose
Replies: 4
Views: 130

Photoelectric Effect Initial Purpose

The photoelectric effect was an "accidental finding", what was the original purpose of the study? Did they ever follow up on that purpose?
by Matia Kim 1B
Fri Oct 12, 2018 2:30 pm
Forum: Properties of Light
Topic: Quantum World Topics
Replies: 3
Views: 40

Re: Quantum World Topics

I personally refer to Khan Academy when I struggle with chemistry related topics. And crash course is always available on YouTube if you haven't checked.
by Matia Kim 1B
Fri Oct 12, 2018 2:24 pm
Forum: Photoelectric Effect
Topic: Work function
Replies: 3
Views: 63

Re: Work function

I personally have never heard of the term workforce in chemistry so I looked it up myself and didn't really find anything relating to chemistry. I would assume it is just the same as work function. But if anybody else knows otherwise that would be great too.
by Matia Kim 1B
Sun Oct 07, 2018 9:59 am
Forum: Molarity, Solutions, Dilutions
Topic: Dilutions Problems
Replies: 3
Views: 112

Dilutions Problems

I've been struggling to figure out if a question is asking for a dilutions solutions or convergence solution. I know you need 3 givens to answer a dilutions but some questions have you figure out the third solution. What should I be looking for to know whether if the question is asking for a dilutio...
by Matia Kim 1B
Sun Oct 07, 2018 9:56 am
Forum: Significant Figures
Topic: Chemical Structure
Replies: 2
Views: 73

Re: Chemical Structure

I don't recall us going over chemical structures too in depth in class, or if we even did that in class yet. I wouldn't focus on that but instead focus on the lecture and stuff from our readings. Hope that this helps!
by Matia Kim 1B
Sun Oct 07, 2018 9:54 am
Forum: SI Units, Unit Conversions
Topic: Accommodation on Section Tests
Replies: 1
Views: 66

Re: Accommodation on Section Tests

Hi I am not a student that has accommodation on section tests but I would highly recommend reaching out to Dr. Lavelle and your TA in person as well as shooting an email if you haven't done so. Goodluck!
by Matia Kim 1B
Sun Jun 10, 2018 11:50 pm
Forum: Conjugate Acids & Bases
Topic: Acids and Bases
Replies: 2
Views: 194

Acids and Bases

Can you split weak acids or bases? If so how? If not, why not?
by Matia Kim 1B
Sun Jun 10, 2018 11:49 pm
Forum: Air Pollution & Acid Rain
Topic: Acid Rain
Replies: 3
Views: 369

Acid Rain

How does ph levels of acid rain differ around the globe?
by Matia Kim 1B
Sun Jun 10, 2018 11:48 pm
Forum: Conjugate Acids & Bases
Topic: Acid and Bases [ENDORSED]
Replies: 2
Views: 200

Acid and Bases [ENDORSED]

Can acids and bases neutralize each other, and if so how? Is it just by mixing solutions?
by Matia Kim 1B
Sun Jun 03, 2018 11:48 pm
Forum: Polyprotic Acids & Bases
Topic: Acid and base Strength [ENDORSED]
Replies: 2
Views: 482

Acid and base Strength [ENDORSED]

What do the strength of acids and base tell us and what is the relationship of acidity to a molecular structure?
by Matia Kim 1B
Sun Jun 03, 2018 11:32 pm
Forum: Lewis Acids & Bases
Topic: Acids/Bases and Lewis Acids/Bases
Replies: 2
Views: 104

Acids/Bases and Lewis Acids/Bases

Why is an acid and base about the donor and acceptor of protons whereas Lewis acids and base is about the donor and acceptor of electron pairs?
by Matia Kim 1B
Sun Jun 03, 2018 11:21 pm
Forum: Naming
Topic: Coordination Compounds
Replies: 3
Views: 217

Coordination Compounds

I'm trying to know what the significance of these are, so what do a coordination sphere, number, and compound tell us?
by Matia Kim 1B
Sat May 26, 2018 6:49 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Valence Bond Theory
Replies: 2
Views: 241

Valence Bond Theory

Can someone explain to me the valence bond theory? or link me to a video that better explains it? I couldn't understand it from what the author said about it in the text.
by Matia Kim 1B
Sat May 26, 2018 6:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecule Shape
Replies: 1
Views: 98

Molecule Shape

Is it possible to determine a molecule's shape using VSPER with a radical molecule?
by Matia Kim 1B
Sat May 26, 2018 6:39 pm
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 4
Views: 166

Hybrid Orbitals

What is the difference between hybrid orbitals and regular (nonhybrid) orbitals?
by Matia Kim 1B
Sun May 20, 2018 11:49 pm
Forum: Octet Exceptions
Topic: Radical
Replies: 1
Views: 149

Radical

Are radical chemical bonds possible without an extra electron to make the number of electrons even? Do they exist without manipulation?
by Matia Kim 1B
Sun May 20, 2018 11:47 pm
Forum: Lewis Structures
Topic: Lewis Structure
Replies: 2
Views: 103

Lewis Structure

A chemical bond with 4 or more elements, do they always bond with one specific atom (one directly in the middle) or can they be two pairs of elements sharing a bond? (kind of difficult to word)
by Matia Kim 1B
Sun May 20, 2018 11:41 pm
Forum: Octet Exceptions
Topic: Octet Exception
Replies: 7
Views: 354

Octet Exception

How do you know if a bond will have an octet exception or not? Is it only by memorization or position of an element on the periodic table?
by Matia Kim 1B
Sun May 13, 2018 6:28 pm
Forum: Octet Exceptions
Topic: Concept of Exceptions
Replies: 4
Views: 191

Concept of Exceptions

Why is it that elements in the third row and below have octect exceptions instead of elements earlier in the periodic table?
by Matia Kim 1B
Sun May 13, 2018 6:14 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent vs Metallic Bonds
Replies: 6
Views: 235

Ionic vs Covalent vs Metallic Bonds

What is the easiest way to distinguish the three different kinds of bonds?
by Matia Kim 1B
Sun May 13, 2018 6:10 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 3
Views: 114

Covalent Bonds

How do you know if a bond is sharing electrons or not?
by Matia Kim 1B
Thu May 03, 2018 5:42 pm
Forum: Trends in The Periodic Table
Topic: Electron affinity
Replies: 4
Views: 170

Electron affinity

The textbook says that electron affinity increases towards the right of the periodic table. Why is that? Also is there a pattern or affinity going down the groups of the periodic table?
by Matia Kim 1B
Thu May 03, 2018 5:38 pm
Forum: Quantum Numbers and The H-Atom
Topic: Bohr radius [ENDORSED]
Replies: 3
Views: 170

Bohr radius [ENDORSED]

The textbook says that a(sub 0) is called the Bohr radius. Is this number a constant and what is its value? If not how do you find it?
by Matia Kim 1B
Wed May 02, 2018 2:31 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 4
Views: 169

Ionization Energy

In lecture today he said that lower ionization energy levels are cations. What is considered a low ionization energy? is it by value or position of the periodic table?
by Matia Kim 1B
Sun Apr 29, 2018 11:04 pm
Forum: *Particle in a Box
Topic: Equation meaning
Replies: 1
Views: 303

Equation meaning

In the caption of the "Particle in a Box" the equation is showed as (n^2*h^2)/(8mL^2). What does that mean and what does the other equation in the textbook (2n+1)(h^2)/8mL^2 mean?
by Matia Kim 1B
Sun Apr 29, 2018 10:52 pm
Forum: *Shrodinger Equation
Topic: Schrodinger equation definition?
Replies: 3
Views: 174

Re: Schrodinger equation definition?

The purpose of this equation is to find both the wavefunction (phi) and the corresponding energy (E). This equation helps us calculate the wavefunction for any particle. The textbook also mentions that this equation is a differential equation, the second derivative of phi, because it relates the der...
by Matia Kim 1B
Fri Apr 27, 2018 4:36 pm
Forum: Properties of Light
Topic: Energy difference in excited electrons
Replies: 3
Views: 119

Re: Energy difference in excited electrons

I am not 100% sure but from the success that I had with these kinds of problems when the values of n aren't given, it would depend on what is given. Assuming that everything but n is given, you would simplify it to 1/n(1)^2 - 1/n(2)^2 = Given info (after simplifying). From here you kind of have to g...
by Matia Kim 1B
Sun Apr 22, 2018 10:26 pm
Forum: *Black Body Radiation
Topic: Black Body Radiation
Replies: 1
Views: 305

Black Body Radiation

How do you know if a black body is emitting or absorbing a particular wavelength? And is black body radiation only the process of emitting different radiation wavelengths?
by Matia Kim 1B
Sun Apr 22, 2018 10:22 pm
Forum: *Black Body Radiation
Topic: What is a black body? [ENDORSED]
Replies: 7
Views: 752

Re: What is a black body? [ENDORSED]

The textbook explains black body as the "hot object" and basically means that it is an object that is extremely hot (so hot it glows white) because it doesn't favor one wavelength over another, in the sense of choosing a wavelength to absorb or emit.
by Matia Kim 1B
Mon Apr 16, 2018 2:35 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Constant
Replies: 2
Views: 88

Rydberg Constant

What is the significance of this value and is this only applied to H-atoms?
by Matia Kim 1B
Sun Apr 15, 2018 10:02 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 1
Views: 40

Photoelectric Effect

In the photoelectric effect slides learned in class, it talks about the concept of a radiation source emitting electrons off a source of metal. Does the kind of metal have any effect on this at all? Or does metal have a consistent value in this relationship between radiation, metal, and emitting ele...
by Matia Kim 1B
Sun Apr 15, 2018 9:51 pm
Forum: Photoelectric Effect
Topic: Radiation and heat
Replies: 1
Views: 37

Radiation and heat

I know that infrared radiation is radiation experienced as heat but do other radiation like visible light have a similar effect by heat?
by Matia Kim 1B
Sun Apr 15, 2018 9:46 pm
Forum: Photoelectric Effect
Topic: When to use Planck's Constant [ENDORSED]
Replies: 5
Views: 205

When to use Planck's Constant [ENDORSED]

I know that Planck's Constant is 6.626 x 10^-34 J S but what's the significance of it and when do you use it?
by Matia Kim 1B
Sun Apr 08, 2018 11:02 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Definition of Avogadro's number
Replies: 3
Views: 238

Definition of Avogadro's number

I am still confused on the idea of how Avogadro's number is consistent with every element. It doesn't make sense to me how an element as light as Hydrogen has the same number as a metal like Silver. Also I am unsure as to why Avogadro's number is a constant in chemistry with all of the other element...
by Matia Kim 1B
Sun Apr 08, 2018 10:58 pm
Forum: Molarity, Solutions, Dilutions
Topic: The effect boiling a substance on its chemistry
Replies: 1
Views: 71

The effect boiling a substance on its chemistry

I understand the law of conservation of mass how matter is neither created nor destroyed. But If you were to dissolve a solution in a substance and boil the substance, would that effect the weight of the substance? Or would it depend on the chemistry of the substance?
by Matia Kim 1B
Sun Apr 08, 2018 10:51 pm
Forum: SI Units, Unit Conversions
Topic: Moles mols mol? [ENDORSED]
Replies: 21
Views: 1273

Moles mols mol? [ENDORSED]

I've seen different forms of the word moles used in the text, homework, and lecture slides and confused as to which term to use when, if it matters. Does it matter which spelling of the word I use (other than adding the "s" for plural).

Go to advanced search