Search found 13 matches

by Kim Chen
Sun Oct 20, 2019 8:59 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: When do you use a negative sign in the Bohr equation?
Replies: 7
Views: 88

Re: When do you use a negative sign in the Bohr equation?

I believe the negative sign is always there. The negative sign is there because of the frame of reference -- when E=0, the electron is free. As the electrons go down in orbitals, they lose energy.
by Kim Chen
Sun Oct 20, 2019 8:03 pm
Forum: Properties of Light
Topic: Which equations only work for light, and which for particles?
Replies: 3
Views: 60

Re: Which equations only work for light, and which for particles?

The equations used for light are c=wavelength * frequency.

The equations for photons/particles:
E = pc
E= hv
by Kim Chen
Sun Oct 20, 2019 4:10 pm
Forum: Properties of Electrons
Topic: Subshell Exceptions
Replies: 6
Views: 107

Re: Subshell Exceptions

Yes, electrons will always act in a way that yields the most stability possible. Drawing out the version you would expect one of them to have vs. the actual version will help you conceptualize more!
by Kim Chen
Sun Oct 20, 2019 4:09 pm
Forum: Administrative Questions and Class Announcements
Topic: Extra help
Replies: 8
Views: 158

Re: Extra help

Doing problems out of the book with a solutions manual also helps a lot!
by Kim Chen
Sun Oct 20, 2019 4:08 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: how to prepare
Replies: 22
Views: 223

Re: how to prepare

Definitely go to the sessions!! There are tons and tons of extra hours of practice available to you. TA office hours also help a lot, and doing homework problems with a solutions manual will help a lot.
by Kim Chen
Sun Oct 20, 2019 4:07 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 58
Views: 1456

Re: Advice for studying

I'd definitely recommend looking over the chapters that you struggle more with after lecture. Skimming before lecture can sometimes help too, but it all depends on what order you like to do things. What I like to do is test it out -- one week, I'll do it before and one week after. Also, doing the ho...
by Kim Chen
Sun Oct 20, 2019 4:05 pm
Forum: Properties of Electrons
Topic: Electron structures
Replies: 4
Views: 72

Re: Electron structures

Remember that electrons will behave in whatever way is most stable to add onto the first person's response.
by Kim Chen
Sun Oct 20, 2019 4:03 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Spin up and spin down
Replies: 13
Views: 182

Re: Spin up and spin down

To respond to the above person about how to determine spin -- you can determine it by drawing out the diagrams with the up and down arrows. Depending on how many outer electrons an element has, the spin will differ.
by Kim Chen
Sat Oct 12, 2019 11:42 pm
Forum: Significant Figures
Topic: Sig Figs at the Beginning or End
Replies: 14
Views: 404

Re: Sig Figs at the Beginning or End

I actually think that once you've applied multiplication to something that you've added/subtracted, you have to use sig figs rather than the rules for addition/subtraction. If you were to multiply something first and then add, you'd follow the addition/subtraction rules. I guess the way I think abou...
by Kim Chen
Sat Oct 12, 2019 11:36 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect and Photons
Replies: 6
Views: 58

Re: Photoelectric Effect and Photons

Just to add to this discussion, this is why we can say that light has particle-like behavior. Photons (as said before) are what a unit of light is referred to as, and when UV light hits a metal surface, electrons will be emitted. Electrons possess particle-like behavior.
by Kim Chen
Sat Oct 12, 2019 11:29 pm
Forum: Empirical & Molecular Formulas
Topic: Nomenclature
Replies: 11
Views: 411

Re: Nomenclature

This was posed as a question to my TA during office hours. In general (at least for now), we shouldn't have to worry about any of that. However, some simple compounds (which you could derive from knowing the general ionic charges) you should be able to figure out.
by Kim Chen
Sat Oct 12, 2019 11:28 pm
Forum: Properties of Light
Topic: Light's Behavior
Replies: 3
Views: 46

Re: Light's Behavior

I believe in lecture, we learned that light generally shows diffraction patterns, which is something that particles will not do. However, light also behaves like a particle because a unit of light is a photon, and high-energy photons will act like particles. This was explained through the photoelect...
by Kim Chen
Sat Oct 12, 2019 11:21 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation
Replies: 13
Views: 147

Re: De Broglie's Equation

To answer the above person — I don't have an exact explanation (might be a good question to ask during OH if you're curious about it/want to conceptualize), but De Broglie's relates the momentum and wavelength of a wave (hence wave-particle dualism), whereas Heisenberg's has nothing to do with this....

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