SAT Subject Physics Practice Question 504: Answer and Explanation

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Question: 504


A hydrogen electron falls from the n = 3 to the n = 1 energy level. Using the chart above, determine how much energy it must release.

A. +.97eV
B. +2.85eV
C. +10.09eV
D. +12.08eV
E. +13.06eV

Correct Answer: D


The correct answer is (D). The electron releases energy when it falls to the n=1 level from the n=3 level. ΔE = E3-E1, yielding a positive +12.08 eV.

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