Use the following figure for the next problem.
-Which of the following transitions from (a)to (e)is(are)not allowed?
A)(a)and (b)
B)(d)and (e)
C)(c)and (e)
D)(c)
E)(d)

Question

Use the following figure for the next problem. 
-Which of the following transitions from (a)to (e)is(are)not allowed?
A)(a)and (b) 
B)(d)and (e) 
C)(c)and (e) 
D)(c) 
E)(d)

Quizplus · Accepted Answer

The allowed transitions in the figure are those that follow the selection rules of quantum mechanics, which dictate that certain changes in energy and angular momentum are necessary. In this case, the transitions from (a) to (b), (b) to (c), and (c) to (d) are all allowed because they involve an increase in energy and a change in the quantum number of angular momentum by one unit. However, the transition from (c) to (e) is not allowed because it violates both of these selection rules. It involves a decrease in energy and a change in the quantum number of angular momentum by two units, which is not allowed. Therefore, the correct answer is C, as this is the only option that includes the transition from (c) to (e) as not allowed.

Use the Following Figure for the Next Problem