2. All of the following sets of quantum numbers are allowed EXCEPT a. n = 5, l =

Question

2. All of the following sets of quantum numbers are allowed EXCEPT

a. n = 5, l = 3, ml = +2, b. n = 3, l = 2, ml = -1, c. n = 3, l = 0, ml = 0, d. n = 4, l = 4, ml = -2, e. n = 5, l = 3, ml = +3

3. Which of the following regions of the electromagnetic spectrum have longer wavelengths than visible light?

a. 1 only, b. 2 only, c. 3 only, d. 1 and 2, e. 1 and 3

4. For a hydrogen atom, calculate the energy of a photon in the Balmer series that results from the transition n = 3 to n = 2. What is the region of the electromagnetic spectrum? The Rydberg constant is -2.18

Explanation / Answer

1) d- d and f oritals ,

2) d - n=4 ,l=4 ,ml =-2,

3) e - 1,3

4) wavenumber = 109677(1/2^2 -1/3^2) = 15232.9 cm-1, =1.5233 x10^ 6 m-1

E = hc(wavenumber) = 6.625 x10^ -34 x 3x10^ 8 x 1.5233 x10^ 6 = 3.027 x10^ -19 Joules,

so answer is e

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