An excited atom can lose energy by
a. emitting a photon
b. absorbing a photon
c. undergoing the photoelectric effect
d. increasing its de Broglie wavelength
e. the uncertainty principle
A
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The concept of entropy tells us how exothermic reactions are
A) favored over endothermic reactions. B) not as favorable as endothermic reactions. C) just as effective as endothermic reactions. D) the reverse of endothermic reactions.