CHEMISTRY COMMUNITY

Kim Chen

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.

Kim Chen

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

The equations for photons/particles:
E = pc
E= hv

Kim Chen

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!

Kim Chen

Doing problems out of the book with a solutions manual also helps a lot!

Kim Chen

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.

Kim Chen

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...

Kim Chen

Remember that electrons will behave in whatever way is most stable to add onto the first person's response.

Kim Chen

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.

Kim Chen

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...

Kim Chen

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.

Kim Chen

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.

Kim Chen

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...

Kim Chen

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....

CHEMISTRY COMMUNITY

Search found 13 matches

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

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

Re: Subshell Exceptions

Re: Extra help

Re: how to prepare

Re: Advice for studying

Re: Electron structures

Re: Spin up and spin down

Re: Sig Figs at the Beginning or End

Re: Photoelectric Effect and Photons

Re: Nomenclature

Re: Light's Behavior

Re: De Broglie's Equation