Question 2: Quantization (9 points) A. Write a set of four quantum numbers possi

ID: 635521 • Letter: Q

Question

Question 2: Quantization (9 points)

A. Write a set of four quantum numbers possible for the circled electron in arsenic (As). (There could be more than one correct answer.) (2 points)

n =

l =

ml =

ms =

B. The electron in a hydrogen atom can undergo a transition from n = 4 to n = 3, emitting a photon with a wavelength of 1875 nm. (4 points)

i. Identify which quantum number is changing and explain what the change represents. (1 point)

ii. How does this transition show that the position of the electron is quantized? (1 point)

iii. How much energy must be absorbed for an electron to go from n = 3 to n = 4? (2 points)

C. In what orbital is an electron located that has quantum numbers of n = 5, l = 0, ml = 0, ms = –? (1 point)

D. Why is it impossible for an electron to have the quantum numbers n = 1, l = 1, ml = 0, ms = –? (2 points)

A. Arsenic - 4s2

n=4; l = 0 ; ml = 0; ms = +1/2 , -1/2(any one value)

B. (I)Principal quantum number changing.that electron moving in 4th energy level to 3rd energy level.

(ii) because electron can have only this wavelength for this partuparti transition.

(iii) E = hc/lambda

= 1.06×10-19 j

C. 5s orbital

D. Because possible values of l for given value of n is 0 to n-1

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