# chemistry

posted by .

I am confused on how to even start this problem...

A ground state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and a second to reach the ground state.
a) What higher level (n=?) did the electron reach?
b) What intermediate level (n=?) did the electron reach?
c) What was the wavelength of the second photon emitted?

Thanks

• chemistry -

For #a.
delta E1 = hc/wavelength but change 94.91 nm to meters first. Then use
delta E1 = 2.180 x 10^-18*[(1/n12)-(1/n22)] where n1 = 1 (the first shell of hydrogen; i.e., the ground state). Solve for N2. I obtained 5 for n2. (That isn't n^2; that is n^2 = 25 + change but round to 25.).

part b.
Go through the same procedure for the 1281 nm line and determine n1. N1 is the final state and n=5 (that's n from part A). Solve for n1. I obtained 3 for that.
That leaves part c to do. The difference in energy must be the amount from n=1 to n=5 minus the energy from n=5 to n=3. The easiest way to do that is to use the above formula and plub in n1 = 1 and n2 = 3.
Show your work if you get stuck.

## Similar Questions

1. ### chemistry

I am confused on how to even start this problem... A ground state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an …
2. ### physics

Hydrogen atom is initially in the ground state. It is excited by a photon bombardment and it then undergoes a transition from n = 3 to n=2 state. a) What is the frequency of the bombarding photon?
3. ### 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?
4. ### physics

A singly ionized helium atom is in the ground state. It absorbs energy and makes a transition to the n = 3 excited state. The ion returns to the ground state by emitting two photons. What are their wavelengths of a lower and higher …
5. ### chem

The electron in a ground state H atom absorbs a photon of wavelength 121.57nm, to what energy level does the electron move?
6. ### chemistry

the electron in a ground state h atom absorbs a photon of wavelength 102.57nm to what energy level does the electron move
7. ### Physics

A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 5 excited state. The atom returns to the ground state by emitting two photons, one in dropping to n = 4 state, and one in further dropping …
8. ### chemistry

An hydrogen atom in the ground state absorbs a photon with a wavelength one and after release a photon with a wavelength two,on which orbital will drop the electron?
9. ### Chemistry

A hydrogen atom in the ground state absorbs a photon with a wavelength and after it release a photon with a second wavelength. On which orbital will drop the electron?
10. ### Chem

The brilliant color of fireworks is produced by shells containing lithium carbonate (Li2CO3) that are launched into the night sky and explode. The explosions produce enough energy to vaporize the Li2CO3 and produce excited state lithium …

More Similar Questions