Question 1
For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 3
d orbital to a 2
p orbital in a hydrogen atom? The Rydberg constant is 1.097 × 10
-2 nm
-1.
◦ 364.6 nm
◦ 656.3 nm
◦ 486.2 nm
◦ 2.057 × 10
-3 nm
Question 2
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?
◦ Electronic transitions require the least energy and vibrational transitions the most.
◦ Vibrational transitions require the least energy and electronic transitions the most.
◦ Vibrational transitions require the least energy and rotational transitions the most.
◦ Rotational transitions require the least energy and electronic transitions the most.
Infrared sensing.
Basic Types of Energy
ATP synthase, a molecular mill.
Energy Balance and Imbalances
Energy flows from the environment into living organisms, then back to the environment
The leptin–melanocortin pathway of energy balance