Molecular vibrational energy transitions are observed in the infrared,molecular rotational transitions in the microwave,and electronic transitions in the ultraviolet-visible range.Which transitions require the most energy and which the least energy?
A)Electronic transitions require the least energy and vibrational transitions the most.
B)Rotational transitions require the least energy and electronic transitions the most.
C)Vibrational transitions require the least energy and electronic transitions the most.
D)Vibrational transitions require the least energy and rotational transitions the most.

Question

Quizplus · Accepted Answer

Electronic transitions require the most energy as they involve the movement of electrons between energy levels. Vibrational transitions require intermediate energy as they involve the stretching and bending of chemical bonds. Rotational transitions require the least energy as they involve the rotation of the entire molecule around its axis. Therefore, option B is the correct answer.

Molecular Vibrational Energy Transitions Are Observed in the Infrared,molecular Rotational