Search found 43 matches

by Leila_4E
Mon Nov 18, 2019 11:46 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi Bonds
Replies: 5
Views: 14

Re: Sigma and Pi Bonds

It seems like all we need to know for sigma/pi bonds for Test 2 is the definition and properties of sigma/pi bonds and what one/two/three bonds mean, is that right?
Thanks!
by Leila_4E
Mon Nov 18, 2019 11:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE formula
Replies: 9
Views: 26

Re: AXE formula

Hi! What's the shape of the AX2E VSEPR formula? I think it is bent or trigonal planar, but I'm not sure.
by Leila_4E
Mon Nov 18, 2019 11:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How to know which angles are smaller
Replies: 8
Views: 28

Re: How to know which angles are smaller

Also, what are the angles of AX5E (which I think is a square pyramidal shape)?
by Leila_4E
Mon Nov 18, 2019 11:42 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How to know which angles are smaller
Replies: 8
Views: 28

Re: How to know which angles are smaller

What are the angles of the AX2E VSEPR formula? I think this is either a bent shape or trigonal planar but I'm not sure
by Leila_4E
Mon Nov 18, 2019 11:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: seesaw
Replies: 5
Views: 19

Re: seesaw

Hi! I think it is less than 90 degrees and 120 degrees.
by Leila_4E
Mon Nov 18, 2019 11:40 pm
Forum: Hybridization
Topic: Hybridization
Replies: 4
Views: 15

Re: Hybridization

Do all molecules use hybridized orbitals?
by Leila_4E
Wed Nov 13, 2019 9:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Self Check 2E.3A
Replies: 2
Views: 16

Re: Self Check 2E.3A

The physical length that we show the triple bond does not matter when drawing, correct?

Thanks!
by Leila_4E
Wed Nov 13, 2019 9:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone pairs of other atoms in molecule
Replies: 3
Views: 12

Re: Lone pairs of other atoms in molecule

I'm confused on the bond angle for T-shaped molecules with 2 lone pairs (and 3 bonding pairs)? Is it all less than 90?
Thanks!
by Leila_4E
Wed Nov 13, 2019 9:05 pm
Forum: Hybridization
Topic: Pi vs Sigma Bonds
Replies: 4
Views: 35

Re: Pi vs Sigma Bonds

Therefore, less orbital overlap means a weaker bond?
Thanks!
by Leila_4E
Wed Nov 13, 2019 9:03 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Determining Polarity
Replies: 5
Views: 39

Re: Determining Polarity

So, just to be sure, if it is a nonmetal + alkaline earth metal, it is polar molecule?
by Leila_4E
Wed Nov 13, 2019 8:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 15
Views: 102

Re: Test 2

Up to what section in the textbook do we need to know for the test?
by Leila_4E
Tue Nov 05, 2019 12:03 am
Forum: Naming
Topic: Naming Compounds (general question)
Replies: 9
Views: 74

Re: Naming Compounds (general question)

From the homework questions, it seems like we do. I'm worried that we do?
by Leila_4E
Tue Nov 05, 2019 12:01 am
Forum: Octet Exceptions
Topic: Octet Rule exceptions
Replies: 14
Views: 69

Re: Octet Rule exceptions

Does anyone happen to know a fun/easy limerick to help memorize these?
Thanks!
by Leila_4E
Tue Nov 05, 2019 12:01 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polar Covalent VS Ionic
Replies: 11
Views: 47

Re: Polar Covalent VS Ionic

This is really helpful, thank you. I'm also having trouble remembering if the ionic radius trend is different than atomic radius trend?
by Leila_4E
Mon Nov 04, 2019 11:59 pm
Forum: Dipole Moments
Topic: Dipole moment calculation
Replies: 2
Views: 22

Re: Dipole moment calculation

Is there a formula we have to remember from the Dipole Moments section? I'm having trouble remembering.
by Leila_4E
Mon Nov 04, 2019 11:58 pm
Forum: Electronegativity
Topic: Ionic or covalent?
Replies: 17
Views: 99

Re: Ionic or covalent?

Will we have to know the actual values of electronegativity to determine the minute differences? I assume probably not..
by Leila_4E
Mon Oct 28, 2019 8:38 pm
Forum: Octet Exceptions
Topic: expanded octet?
Replies: 9
Views: 57

Re: expanded octet?

Were there any other elements perhaps in the same group way down the periodic table that have this exception other than those 3?
by Leila_4E
Mon Oct 28, 2019 8:37 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 14
Views: 58

Re: Electronegativity

Daria Azizad 1K wrote:Electronegativity also decreases down the periodic table because as more shells are added, the more distant the positive nucleus is from other electrons it would attract; thus the electrostatic forces of attraction are weaker.


This helps so much! Thank you!
by Leila_4E
Mon Oct 28, 2019 8:36 pm
Forum: Electronegativity
Topic: Fluorine's Electronegativity
Replies: 6
Views: 27

Re: Fluorine's Electronegativity

I don't really understand why elements in group 1 are not highly electronegative? Maybe I don't know the definition of electronegativity.
Also, why does electronegativity increase at you go up the groups?
by Leila_4E
Mon Oct 28, 2019 8:32 pm
Forum: Octet Exceptions
Topic: aufbau principle
Replies: 8
Views: 48

Re: aufbau principle

So when we draw the orbital configuration, does 4s go in a row below 3d if we are drawing it vertically with the higher energy levels going up?
by Leila_4E
Mon Oct 28, 2019 8:30 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Purpose of the Equation
Replies: 9
Views: 41

Re: Purpose of the Equation

This is very helpful! Thank you!
And this is the same equation that Dr. Lavelle talked about how the velocity does not matter as much as the mass because when things are super small the differences in velocity don't make much of a difference?
(Sorry if that was worded very poorly!)
by Leila_4E
Mon Oct 28, 2019 8:28 pm
Forum: Administrative Questions and Class Announcements
Topic: 10/28 Updates due to Fire [ENDORSED]
Replies: 14
Views: 524

Re: 10/28 Updates due to Fire [ENDORSED]

Hi! I was also wondering when other midterm review sessions will be?
by Leila_4E
Thu Oct 17, 2019 11:02 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electron configurations
Replies: 2
Views: 23

Re: Electron configurations

Also, to what extent do you think we have to know and memorize the configurations? Do we have to be able to recognize each one up to the d orbitals?
by Leila_4E
Thu Oct 17, 2019 10:55 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Magnetic Quantum number [ENDORSED]
Replies: 4
Views: 36

Re: Magnetic Quantum number [ENDORSED]

In the 3p subshell, where l=1, does this mean ml=0? Can ml=0?
by Leila_4E
Thu Oct 17, 2019 10:50 am
Forum: Quantum Numbers and The H-Atom
Topic: 1D 13 Homework [ENDORSED]
Replies: 1
Views: 33

1D 13 Homework [ENDORSED]

Hi! I am struggling a lot with 1D 13 b. How can be find the values of ml for an electron in the 6d subshell?
by Leila_4E
Thu Oct 17, 2019 10:47 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Indeterminacy in Position [ENDORSED]
Replies: 5
Views: 36

Re: Indeterminacy in Position [ENDORSED]

So what distance does Δx represent on the electron level? The change in position between the first energy state and the second?
by Leila_4E
Thu Oct 17, 2019 10:39 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Momentum
Replies: 7
Views: 54

Re: Momentum

I still don't understand why delta v is equal to the +/- number attached to the velocity when the velocity is given. It seems like it should be twice the value of the number that is +/-, but my TA told be explicitly that it is not.
by Leila_4E
Thu Oct 17, 2019 10:36 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: HW D13
Replies: 3
Views: 26

Re: HW D13

Yeah, I am also confused about this problem. For question b, too. What does 6d subshell translate to in terms of l and n values?
(I apologize for not answering your question!)
by Leila_4E
Tue Oct 08, 2019 11:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1064

Re: Week 2 Homework Problems [ENDORSED]

Are the TA discussions going to start to do homework problems in class?
by Leila_4E
Tue Oct 08, 2019 11:20 pm
Forum: Properties of Light
Topic: What does n stand for in quantum
Replies: 4
Views: 52

Re: What does n stand for in quantum

The energy level of electrons as in which specific electron ring you are on?
Thank you!
by Leila_4E
Tue Oct 08, 2019 11:05 pm
Forum: Einstein Equation
Topic: Planack's constant
Replies: 8
Views: 87

Re: Planack's constant

Where does the constant come from? How was it derived?
by Leila_4E
Tue Oct 08, 2019 10:56 pm
Forum: Photoelectric Effect
Topic: How much energy to remove one electron?
Replies: 8
Views: 89

Re: How much energy to remove one electron?

What is the work function?
by Leila_4E
Tue Oct 08, 2019 10:56 pm
Forum: Properties of Light
Topic: Light intensity
Replies: 10
Views: 64

Re: Light intensity

Is there a difference between the energy per photon and the threshold energy?
by Leila_4E
Tue Oct 08, 2019 10:51 pm
Forum: Einstein Equation
Topic: Wavelengths
Replies: 5
Views: 83

Re: Wavelengths

Is the threshold energy and the energy required to remove an electron the same?
by Leila_4E
Tue Oct 08, 2019 10:49 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 4
Views: 57

Re: Photoelectric effect

Can someone explain the details of how if you decrease the intensity of light it doesn't decrease the amount of energy or something? I'm so confused about the minute instances of that.
by Leila_4E
Tue Oct 08, 2019 10:45 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 66
Views: 950

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]

Do we have to have the formulas of the polyatomic ions memorized?
by Leila_4E
Mon Sep 30, 2019 5:10 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical Formula
Replies: 6
Views: 52

Re: Empirical Formula

After we have found the empirical formula, we can leave it as it is (if that is what the problem asked for), right? Only when they give us a mass that is different than the empirical formula mass we have calculated do we have to multiply the empirical formula formula units by whatever factor the mas...
by Leila_4E
Mon Sep 30, 2019 5:08 pm
Forum: Significant Figures
Topic: Sig Figs in Scientific Notation
Replies: 5
Views: 67

Re: Sig Figs in Scientific Notation

When it comes to tests in class, how crucial is our accuracy of sig figs? Will we get the whole problem wrong if we have the wrong number of sig figs?
by Leila_4E
Mon Sep 30, 2019 5:04 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 166
Views: 100968

Re: Rusty on High School Chem [ENDORSED]

Since we only have to turn in 5 answers per week, do you advise not necessarily doing all the problems listed in the syllabus and once we feel confident that we understand the material then we just make sure we have the 5 questions?
by Leila_4E
Mon Sep 30, 2019 5:00 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 129
Views: 75195

Re: Reading the textbook [ENDORSED]

When doing the practice problems for homework, do you all suggest looking at each answer right after you complete the question? Or should I only check the answers I feel shaky on? Or should I check all the answers at once after I complete all of them?
by Leila_4E
Mon Sep 30, 2019 4:59 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 129
Views: 75195

Re: Reading the textbook [ENDORSED]

I look at the examples only on topics I don't/wouldn't understand. Since the first couple units are review of High School Chem, I've been reading for content, not so much examples.

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