# Chemistry

posted by .

Calculate the level from which the electron fell, n2, for the hydrogen line you observed.

wavelength (lambda) = 400 nm
n1 = 2
RH = 2.18 x 10^-18

I keep having trouble with finding n2. Is the above given right to plug in for 1/(lambda) = RH (1/n1^2 - n2^2)

thank you for any help

• Chemistry -

no. Your constant is not right.
The Rydberg constant, RH = 1.097E7.
1/wavelenth = RH(1/n1^2 - 1/n2^2)
wavelength must be converted to meters.

• Chemistry -

Okay, I was solving out this this equation for n2^2

n2^2 = 1(1/n - E/Rh)

Is this right?

• Chemistry -

If its okay, can you show me in detail how to find n2^2 because I have done this three times and I'm still a little confused by this.

• Chemistry -

I think it is far easier to substitute the numbers, then do the math than try to manipulate all of the variables. I use one of the following where w = wavelength:
1/w = 2.180E-19/hc x (1/n1^2 - 1/n2^2) but it is much easier to simplify that by
1/w = RH(1/n1^2 - 1/n2^2). That formula is the original Rydberg formula I believe. Using the 2.180 number as well as substituting h and c is just asking for more places for a mistake in my opinion.

• Chemistry -

ok thank you very much

## Similar Questions

1. ### Physics

Hi I was wondering if somebody could help me with this question?
2. ### chemistry

help needed in drawing the diagram to show how hydrogen has numerous spectral lines I also need help with this question.... ---------------- ---------------- ---------------- ---------------- ---------------- -------------------- Each …
3. ### Atomic physics

5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. b. Calculate the wavelength of …
4. ### Chemistry

A line in the Lyman series of the hydrogen atom emission results from the transition of an electron from the n=3 level to the ground state level. a) What n level (#) is the ground state level for the hydrogen atom?
5. ### chem

What is the wavelength (in nm) of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =5 to the orbital with n = 2?
6. ### Chemistry

Energy Level Transfer of Hydrogen's electron. For each line, determine the prinicpal energy level to which hydrogen's electron was excited. When the electron fell to the 2nd level, energy was released corresponding to each of the lines. …
7. ### Chemistry

A line in the Balmer series of hydrogen has a wavelength of 486 nm. From what state did the electron originate?
8. ### Chemistry

Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n = 2 to the level n = 1.
9. ### Chemistry

Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n = 4 to the level n = 1.v
10. ### Chemistry

The photoelectric effect is a concern in space, where parts of a spacecraft exposed to the sunlight will develop a net positive charge, which can interfere with or damage sensitive cir The panels that cover the exterior of the Space …

More Similar Questions