Search found 31 matches

by abby hyman
Tue Nov 12, 2019 9:20 am
Forum: Lewis Structures
Topic: Center of a Lewis Structure
Replies: 7
Views: 86

Re: Center of a Lewis Structure

I figure out which atom is the least electronegative which is often the one with the lowest ionization energy. Nitrogen and Oxygen are exceptions to this though
by abby hyman
Tue Nov 12, 2019 9:19 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing Power
Replies: 6
Views: 70

Re: Polarizing Power

Polarizability is how easily an electron cloud is distorted by an electric field. Polarizing power is a cations ability to attract valence electrons from a nearby anion in ionic compounds
by abby hyman
Tue Nov 12, 2019 9:16 am
Forum: Sigma & Pi Bonds
Topic: Sigma & Pi Bonds
Replies: 5
Views: 87

Re: Sigma & Pi Bonds

Sigma bonds are formed by end to end overlapping atomic orbitals. Pi bonds are when the lobe of one atomic orbital overlaps with another.
by abby hyman
Tue Nov 12, 2019 9:14 am
Forum: Dipole Moments
Topic: 3F.11
Replies: 3
Views: 46

Re: 3F.11

I agree with this. hydrogen bonds form only when hydrogen bonds with nitrogen oxygen or florine so D would be the only one that forms a hydrogen bond.
by abby hyman
Tue Nov 12, 2019 9:12 am
Forum: Administrative Questions and Class Announcements
Topic: Test #2
Replies: 22
Views: 2144

Re: Test #2

I also am wondering. My TA said that they have not written yet so do not know...
by abby hyman
Sun Nov 03, 2019 11:55 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 9
Views: 198

Re: Atomic Radius

Atomic radius increases as you move from the top right corner of the periodic table to the bottom left. As you add more electrons the radius increases until a new shell is added when you move down to the next period
by abby hyman
Sun Nov 03, 2019 11:50 pm
Forum: Properties of Electrons
Topic: Rydberg Constant
Replies: 2
Views: 130

Re: Rydberg Constant

The Rydberg formula is a mathematical formula used to predict the wavelength of light resulting from an electron moving between energy levels of an atom.
by abby hyman
Sun Nov 03, 2019 11:46 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent
Replies: 14
Views: 174

Re: Ionic vs Covalent

The difference between ionic and covalent bonds are the type of element involved in the reaction. Ionic bonds are between a metal and a nonmetal while covalent bonds are between two non-metals.
by abby hyman
Sun Nov 03, 2019 11:45 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 58
Views: 1942

Re: Study Tips

The online modules and assessments are so helpful for this class you can really see if you understand the material. I have found youtube videos helpful as well for more knowledge on sections I do not understand.
by abby hyman
Sun Nov 03, 2019 11:42 pm
Forum: Photoelectric Effect
Topic: Best way to study for this topic?
Replies: 8
Views: 254

Re: Best way to study for this topic?

The pre and post assessments on the class website are very helpful for studying as well as the module videos.
by abby hyman
Sun Oct 27, 2019 10:11 pm
Forum: Ionic & Covalent Bonds
Topic: Metals Vs. Nonmetals
Replies: 8
Views: 186

Re: Metals Vs. Nonmetals

Nonmetals do not form cations because their ionization energy is too high, they share electrons to form covalent bonds
by abby hyman
Sun Oct 27, 2019 10:10 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge purpose
Replies: 40
Views: 2353

Re: Formal charge purpose

Formal charge indicates the gain or loss of electrons while forming covalent bonds. Used to find which is the most stable
by abby hyman
Sun Oct 27, 2019 10:08 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic v. Covalent
Replies: 6
Views: 55

Re: Ionic v. Covalent

ionic bonds are between a metal and a non-metal and covalent are between two non-metals
by abby hyman
Sun Oct 27, 2019 10:04 pm
Forum: Ionic & Covalent Bonds
Topic: periodic table
Replies: 10
Views: 111

Re: periodic table

electronegativity increases as you move left to right and decreases as you move down on the periodic table
by abby hyman
Sun Oct 27, 2019 10:01 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 4916

Re: Test 1 [ENDORSED]

My TA said there will be material from test 1 on the midterm, but test 2 is from after the midterm to the test and then the final will be comprehensive from the first test on
by abby hyman
Sun Oct 20, 2019 9:19 pm
Forum: Properties of Light
Topic: Midterm Exam
Replies: 21
Views: 257

Re: Midterm Exam

Drake Choi_1I wrote:Is there going to be a curve for the midterm? Or is grade based on raw score?


No curve in the class so just your raw score from all assignments added up out of 500 I believe
by abby hyman
Sun Oct 20, 2019 9:17 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 340

Re: Unit for Wavelength

since wavelength is a measure of distance it is found in meters, pm, or nm
by abby hyman
Sun Oct 20, 2019 9:15 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 1108

Re: Best Way To Study?

When studying by doing practice problems from the textbook, how do you guys check if your answers are correct? For me many times I may think I got the correct answer when I really didn't. There is a solution manual for the textbook questions so you can check if you did the work correctly that way! ...
by abby hyman
Sun Oct 20, 2019 9:13 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Incorrect atomic model example
Replies: 3
Views: 48

Re: Incorrect atomic model example

The unrealistic answer tells us that the electrons cannot be located at the nucleus of the atom, because the value we used for the uncertainty in position for the calculation was the diameter of the hydrogen nucleus. This tells us that electrons cannot be located in the nucleus, and therefore are o...
by abby hyman
Sun Oct 20, 2019 9:11 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Spin up and Spin down
Replies: 2
Views: 29

Re: Spin up and Spin down

I am also very confused on this topic and how to tell if they are parallel or paired?
by abby hyman
Sun Oct 13, 2019 12:39 pm
Forum: Photoelectric Effect
Topic: Proportional sign
Replies: 4
Views: 63

Re: Proportional sign

Claire Grover 3G wrote:∝ is the sign! Basically instead of writing E = hv, you could write E ∝ v, which means that E is proportional to v (by a factor of h).


I agree with this. This shows that E and v are proportionate to each other.
by abby hyman
Sun Oct 13, 2019 12:38 pm
Forum: Bond Lengths & Energies
Topic: Bond lengths
Replies: 15
Views: 190

Re: Bond lengths

Wendy Perez 3A wrote:I believe that Dr. Lavelle mentioned this once in his lectures. A bond length between two molecules is about 10^-10m, which is equal to 1 Angstrom.


Yes, this is correct. A bond length is always equal to 1 angstrom
by abby hyman
Sun Oct 13, 2019 12:34 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation
Replies: 9
Views: 133

Re: DeBroglie Equation

Since you have to have a mass to find wavelength using DeBroglie's equation, it would be impossible for it to work for light because light has no mass.
by abby hyman
Sun Oct 13, 2019 12:33 pm
Forum: Properties of Light
Topic: Large Objects
Replies: 7
Views: 85

Re: Large Objects

I agree with the statements above. In De Broglie's formula, since you are dividing by mass to get wavelength, the inverse relationship would make the wavelength smaller as the object gets bigger in mass.
by abby hyman
Sun Oct 13, 2019 12:26 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 68
Views: 3266

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

My TA informed us on Monday that if we have the correct answer we get full credit, but if we don't have the correct answer we can get partial credit if the work we've shown is correct but a calculation was messed up
by abby hyman
Thu Oct 03, 2019 5:25 pm
Forum: Significant Figures
Topic: sig figs in calculations
Replies: 4
Views: 51

Re: sig figs in calculations

You should only use sig figs in your final answer to avoid error and not have incorrect numbers in your final answer.
by abby hyman
Thu Oct 03, 2019 5:22 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: States of Matter
Replies: 9
Views: 289

Re: States of Matter

The states of matter do not matter when balancing a chemical equation
by abby hyman
Thu Oct 03, 2019 5:20 pm
Forum: Empirical & Molecular Formulas
Topic: Calculating Empirical Formula with Given Amounts of Each Element
Replies: 7
Views: 84

Re: Calculating Empirical Formula with Given Amounts of Each Element

Personally, I like using the 100 g method because if there is such a question that says " there is 40%C, 10%O, 20%H, and an unknown amount of a 4th element, it makes it way easier to go from there inorder to calculate the empirical formula. I agree with this, the 100 g method is the easiest be...
by abby hyman
Thu Oct 03, 2019 5:07 pm
Forum: General Science Questions
Topic: Naming compounds
Replies: 6
Views: 107

Re: Naming compounds

My TA said the same, the common ones that we've been using in class and such will be used but for the most part, we will be given them.
by abby hyman
Thu Oct 03, 2019 5:05 pm
Forum: General Science Questions
Topic: Naming compounds
Replies: 6
Views: 107

Re: Naming compounds

My TA said the same, the common ones that we've been using in class and such will be used but for the most part, we will be given them.
by abby hyman
Thu Oct 03, 2019 5:00 pm
Forum: Limiting Reactant Calculations
Topic: Homework Week 1
Replies: 18
Views: 293

Re: Homework Week 1

Johnathan Smith 1A wrote:Can someone clarify exactly what we are supposed to do for Homework? Are we doing five problems overall or five from each section?

For the homework, you only need to turn in five problems overall, the list of questions in the different sections is just the array of questions to choose from.

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