Search found 30 matches

by madisonhanson1b
Sun Jun 03, 2018 11:21 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number vs. oxidation number [ENDORSED]
Replies: 4
Views: 344

Re: coordination number vs. oxidation number [ENDORSED]

Oxidation number is how many electrons an atom will lose during bonding and the coordination number refers to the number of regions of electron density surrounding the central atom in a compound.
by madisonhanson1b
Sun Jun 03, 2018 11:17 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond angles [ENDORSED]
Replies: 3
Views: 136

Re: Bond angles [ENDORSED]

The presence of lone pairs will cause all the bond angles in the atom to be slightly smaller than their original size, however we are not responsible for knowing how much the repulsion will affect this. We only need to know that the lone pairs make the bonds smaller.
by madisonhanson1b
Sun Jun 03, 2018 11:15 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Question 4.29 [ENDORSED]
Replies: 4
Views: 91

Re: Question 4.29 [ENDORSED]

If two dipole moments point in exact opposite directions they will cancel each other out and cause the molecule to be non polar, but if the dipole moments do not exactly cancel each other out then there will be a resulting polarity of the molecule.
by madisonhanson1b
Sun Jun 03, 2018 11:13 am
Forum: Hybridization
Topic: Question 4.45
Replies: 3
Views: 70

Re: Question 4.45

Pi bonds involve the overlapping of atomic orbitals in covalent bonds. Pi bonds are only used when there is more than one bond (double or triple bond)
by madisonhanson1b
Sun Jun 03, 2018 11:11 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Final
Replies: 5
Views: 198

Re: Final

As I understand we only have to understand how coordination complexes work, not name them, correct?
by madisonhanson1b
Sun May 20, 2018 4:50 pm
Forum: Ionic & Covalent Bonds
Topic: Octet rule
Replies: 17
Views: 531

Re: Octet rule

I know elements can break the octet rule, but up to how many extra electrons can they have?
by madisonhanson1b
Sun May 20, 2018 4:48 pm
Forum: Ionic & Covalent Bonds
Topic: double and triple bonds?
Replies: 2
Views: 73

Re: double and triple bonds?

The elements in the 7th column never form double bonds, as a general rule
by madisonhanson1b
Sun May 20, 2018 4:38 pm
Forum: Lewis Structures
Topic: 3.55
Replies: 6
Views: 146

Re: 3.55

Anytime a compound or molecule has an odd number of electrons its going to be a radical
by madisonhanson1b
Sun May 20, 2018 4:34 pm
Forum: Lewis Structures
Topic: 3.33 c). Ionization energy question.
Replies: 4
Views: 124

Re: 3.33 c). Ionization energy question.

I thought you put the molecule with the lowest electronegativity in the center, are ionization energy and electronegativity the same thing?
by madisonhanson1b
Sun May 20, 2018 4:33 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic compound
Replies: 2
Views: 80

Re: Ionic compound

This is correct!
by madisonhanson1b
Sun May 20, 2018 4:31 pm
Forum: Ionic & Covalent Bonds
Topic: Polar covalent bonds
Replies: 2
Views: 107

Re: Polar covalent bonds

A polar covalent bond is when electrons are shared between the atoms (as opposed to transferred which would be ionic) but the sharing is not completely equal. That means that the shared electrons will be pulled closer to one atom than the other, but they are still shared
by madisonhanson1b
Sun May 20, 2018 10:10 am
Forum: Lewis Structures
Topic: Lewis Structure of XeO2F2
Replies: 2
Views: 136

Lewis Structure of XeO2F2

Can someone explain why Xe can have so many bonds/ lone pair electrons in this lewis structure?
by madisonhanson1b
Wed May 09, 2018 12:42 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Significant Figures [ENDORSED]
Replies: 4
Views: 257

Midterm Significant Figures [ENDORSED]

Hello Does anyone know how heavily sig figs are weighted on the midterm? As in, if we dont properly use sig figs would an entire answer be wrong or would just a couple points be taken off for lack of sig figs? Also, if a problem uses an answer you had to obtain earlier in the problem do you use the ...
by madisonhanson1b
Wed May 09, 2018 12:38 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: E=R(1/n-1/n)?
Replies: 7
Views: 332

Re: E=R(1/n-1/n)?

When given two energy levels (n1,n2) or a beginning and ending energy state you can use the E=R(1/n-1/n). The other formula, E=-R(h/n^2) is used to find the energy of an electron in the nth state of a hydrogen atom specifically
by madisonhanson1b
Wed May 09, 2018 12:34 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: equation
Replies: 2
Views: 135

Re: equation

Also, at one of the review sessions they said that most of the time you will just need to use (=) not (>=) for the equations we are currently doing
by madisonhanson1b
Wed May 09, 2018 12:32 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Order of Orbitals
Replies: 3
Views: 169

Re: Order of Orbitals

Chromium also has the same except rule as copper!
by madisonhanson1b
Wed May 09, 2018 12:31 pm
Forum: Trends in The Periodic Table
Topic: Ionization exceptions [ENDORSED]
Replies: 8
Views: 770

Re: Ionization exceptions [ENDORSED]

The ionization energies and electron affinities of carbon, nitrogen, oxygen, and fluorine do not match with the trends perfectly. Also, chromium and copper have unique electron configuration rules.
by madisonhanson1b
Wed May 09, 2018 12:29 pm
Forum: Ionic & Covalent Bonds
Topic: Periodic Trends
Replies: 3
Views: 142

Re: Periodic Trends

I am pretty sure covalent radius is not a trend on the periodic table.
by madisonhanson1b
Wed May 09, 2018 12:28 pm
Forum: Properties of Light
Topic: Energy vs Intensity
Replies: 4
Views: 171

Re: Energy vs Intensity

However, I think you have to be careful because "intensity" of light (or bright vs faint light) does not affect anything during electron emission, whereas wavelength and frequency will affect this.
by madisonhanson1b
Wed May 09, 2018 12:26 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Test 2 Q.4
Replies: 3
Views: 240

Re: Test 2 Q.4

You can use two equations to reach a final answer. The first equation is deltaE=hv(frequency). You can then use the equation v(frequency)=c/wavelength as a substitute for v(frequency). This will give you the combined equation of deltaE=hc/wavelength. H and C are both constants and the wavelength is ...
by madisonhanson1b
Tue May 01, 2018 4:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Review Sessions [ENDORSED]
Replies: 3
Views: 154

Review Sessions [ENDORSED]

Hello! I am planning on going to many of the review/workshop sessions coming up, but I was wondering if it would be possible to have the review sessions either BruinCast or have the review material posted on the website somewhere. I know I am probably not the only one who would like to attend all th...
by madisonhanson1b
Wed Apr 18, 2018 4:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Test Number 1
Replies: 10
Views: 458

Re: Test Number 1

I dont know the average score, but a lot of kids in my discussion were not able to finish all the problems, if that makes you feel better.
by madisonhanson1b
Wed Apr 18, 2018 4:25 pm
Forum: Properties of Electrons
Topic: Diffraction meaning
Replies: 6
Views: 242

Re: Diffraction meaning

Constructive diffraction is when the peaks and troughs of the waves line up, the other diffraction is when the peaks and troughs of the waves do not line up and then essentially cancel each other out (in really basic terms)
by madisonhanson1b
Wed Apr 18, 2018 4:20 pm
Forum: DeBroglie Equation
Topic: Measurable Wavelike properties
Replies: 3
Views: 125

Re: Measurable Wavelike properties

He said the approximate cutoff is 10^-18 for whether or not you would be able to observe the wavelike properties.
by madisonhanson1b
Mon Apr 09, 2018 2:02 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework for Week 2
Replies: 2
Views: 113

Re: Homework for Week 2

I believe the homework for week 2 is from outline 2, but after doing some research I am not positive because the schedule is not explicitly mentioned.
by madisonhanson1b
Mon Apr 09, 2018 1:59 pm
Forum: Significant Figures
Topic: Sig fig simple question [ENDORSED]
Replies: 5
Views: 237

Re: Sig fig simple question [ENDORSED]

In this case, if the decimal was .985243649 but you only wanted one significant figure would you round up to 1? Or would you stay at .9
by madisonhanson1b
Mon Apr 09, 2018 1:57 pm
Forum: Properties of Light
Topic: Speed of light wavelength equation [ENDORSED]
Replies: 4
Views: 251

Re: Speed of light wavelength equation [ENDORSED]

Most commonly I think we have been using the equation in the form wavelength= c (3.0 x 10^8)/ frequency to solve for the wavelength. I feel like that is the most common form of the equation that we have seen.
by madisonhanson1b
Fri Apr 06, 2018 2:30 pm
Forum: Balancing Chemical Reactions
Topic: H.5: Balancing Equations
Replies: 6
Views: 397

Re: H.5: Balancing Equations

I always find it helpful to fully erase and rewrite the coefficients to keep the problem organized. Also remember that you can use fractions in certain spots to make the math a bit easier then you can multiply everything by the denominator of the fraction.
by madisonhanson1b
Fri Apr 06, 2018 2:25 pm
Forum: SI Units, Unit Conversions
Topic: Calculator On Test [ENDORSED]
Replies: 1
Views: 85

Calculator On Test [ENDORSED]

Will we be able to use a calculator on Test 1 and all future tests?
by madisonhanson1b
Fri Apr 06, 2018 2:21 pm
Forum: Significant Figures
Topic: Sig Figs [ENDORSED]
Replies: 9
Views: 431

Re: Sig Figs [ENDORSED]

Hey Brynne!
You will not need sig figs for test 1 but probably will need them in the future, Lavelle just said this in lecture today.

Madison

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