# Chem

What is the wavelength of the transition from n=4 to n=3 for Li2+? In what region of the spectrum does this emission occur? Li2+ is a hydrogen-like ion. Such an ion has a nucleus of charge +Ze and a single electron outside this nucleus. The energy levels of the ion are -Z^2RH/n^, where Z is the atomic number

okay I saw the rydberg formula but how am i or what numbers am i supposed to plug where

1. 👍
2. 👎
3. 👁
1. The Rydberg formula has terms 1/n1^2 and 1/n2^2 in it, wwhere n1 and n2 are the quantum numbers of the lower and upper electron enery levels of the transition. In your case, n1=2 and n2=3. There should also be a Z^2 tem, and in your case Z=3. The wavelength should be t 1/9 of the wavelength of the Balmer red line of hydrogen, which has the same quantum numbers. This puts the corresponding Lithium line into the so-called "vacuum ultraviolet".

1. 👍
2. 👎
2. so am I solving for Rh

This is what the equation should look like right:

1/9= Rh (1/2)-(1/3)

1. 👍
2. 👎
3. No. You are supposed to be solving for the wavelength, not Rh. The Rydberg constant for Li+++ is nine times the Rydberg for H+, because Z=3. That makes the wavelengths 1/9 as large, for the same values of n1 and n2.

Your formula is also wrong. The quantum numbers get squared.

Take a look at "Ryberg constant for hydrogen" at

1. 👍
2. 👎

## Similar Questions

1. ### physics

Wavelength In Different Media Quick Check 1.) The sound of a plucked guitar string travels through the air and strikes the eardrum of a person in the same room. How does the sound wave change when it transfers from the air to the

2. ### Chemistry

According to the quantum-mechanical model for the hydrogen atom, which of the following transitions would produce light with longer wavelength: 3p to 2s or 4p to 2s? A) The 3p to 2s transition would produce light with longer

3. ### CHEM

A hydrogen atom’s electron moves from the n=4 level to the n=6 level. What is the wavelength of light associated with this transition? Is the light absorbed of emitted?

4. ### Chemistry

what is the wavelength of a photon emitted during a transition from the initial state(ni)=5 state to the final state(nf)=2 state in the hydrogen atom?

1. ### Physics

Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water,

2. ### Chemistry

What electron transition in a hydrogen atom, ending in the orbit 4, will produce light of wavelength 2170 nm ?

3. ### probability

Consider a Markov chain {X0,X1,…}, specified by the following transition probability graph. P(X2=2∣X0=1)= - unanswered Find the steady-state probabilities ð1, ð2, and ð3 associated with states 1, 2, and 3, respectively.

4. ### Chemistry

What is the wavelength of the transition from n=4 to n=3 for Li2+? In what region of the spectrum does this emission occur? Li2+ is a hydrogen-like ion. Such an ion has a nucleus of charge +Ze and a single electron outside this

1. ### Chem

Hello 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? Note, the line corresponds to the energy

2. ### Chemistry

What is the wavelength of a proton traveling at a speed of 6.21 km/s? What would be the region of the spectrum for electromagnetic radiation of this wavelength. For this one I did the same thing 6.63 X 10^-34/ (? kg)(6210 m/s) =

3. ### Chemistry

The energy levels of one-electron ions are given by the equation: En=(-2.18*10^(-18)J)(Z^2/n^2) The series in the He spectrum that corresponds to the set of transitions where the electron falls from a higher level to the nf = 4

4. ### Chemistry

When an electron makes a transition from the n=3 to the n=2 hydrogen atom bohr orbit, the energy difference between these two orbits (3.0x10^-19 J) is given off in a photon of light. The relationship ... between the energy of a