Rydberg's formula

Moderators: Chem_Mod, Chem_Admin

Shanmitha Arun 1L
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am
Been upvoted: 1 time

Rydberg's formula

Postby Shanmitha Arun 1L » Tue Oct 17, 2017 3:57 pm

I don't really understand what Rydberg's formula is about and the meaning of the different levels. Also, will the series we are starting from and jumping to be given?
Last edited by Shanmitha Arun 1L on Wed Oct 18, 2017 3:47 pm, edited 1 time in total.

manasa933
Posts: 72
Joined: Fri Sep 29, 2017 7:04 am

Re: Reinberg's formula

Postby manasa933 » Tue Oct 17, 2017 7:46 pm

Different levels signify the different energies the electrons will possess when in that level. Rydberg's equation correlates energy levels with the frequency of the electron in that level.

It depends on the question. Sometimes, they may want you to find out the initial or final energy level using the wavelength or frequency, which will be given.

JamesAntonios 1E
Posts: 70
Joined: Fri Sep 29, 2017 7:04 am

Re: Reinberg's formula

Postby JamesAntonios 1E » Tue Oct 17, 2017 7:49 pm

It's easier to think about in terms of E=-hR/n^2. Then, calculated the change of final-initial. Or use energy to get wavelength or frequency. Hope this helps!

Misa Belser 3C
Posts: 20
Joined: Fri Sep 29, 2017 7:06 am

Re: Rydberg's formula

Postby Misa Belser 3C » Thu Oct 19, 2017 9:28 am

Another equation is v=R(1/n1^2-1/n2^2)

Vasiliki G Dis1C
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

Re: Rydberg's formula

Postby Vasiliki G Dis1C » Thu Oct 19, 2017 12:13 pm

Rydberg's equation is used when you want to find the wavelength, frequency, or energy of an electron moving from one level to another. Most of the time you will be given the starting and final energy levels (n1 and n2), but sometimes the question might ask you to solve for n1 or n2. In this case, make sure you always remember to take the square root.

In terms of using Rydberg's equation, it sometimes can get confusing. If you find that you are always getting an incorrect answer using it, you can use E=-hR/n^2. To use this equation, you plug in n1, and then use the equation again for n2. Once you have your 2 values, you find the ΔE, which is calculated by doing your final value minus your initial value (so n2-n1 if it is going from n1 to n2). Since ΔE is equal to hv, you are still able to find the frequency.

Adam Enomoto 1L
Posts: 53
Joined: Fri Sep 29, 2017 7:03 am

Re: Rydberg's formula

Postby Adam Enomoto 1L » Thu Oct 19, 2017 12:16 pm

I'm also confused as to when to make the value of r negative. I know lavelle mentioned that it was negative if energy was released, but I have yet to see a problem where it needed to be negative.

aaron tang 2K
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

Re: Rydberg's formula

Postby aaron tang 2K » Fri Oct 20, 2017 12:01 am

Rydberg's formula is used for finding the wavelength, energy, or frequency of an electron that is moving from one level to the next. Usually you the initial and final levels will be given, but in some other cases, the question will ask for the initial and the final. So that's when you used the formula v=R(1/n(initial)^2 - 1/n(final)^2).


Return to “Properties of Electrons”

Who is online

Users browsing this forum: No registered users and 0 guests