SAT Subject Physics Practice Question 382: Answer and Explanation

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Question: 382

3. Question below relates to the following chart, which is a partial energy level diagram for the hydrogen electron.

The question relates to a hydrogen electron located at E-3. What is the emission energy when theelectron falls to E-1 from E-3?

A. ±.66eV
B. ±.966eV
C. ±1.89eV
D. ±10.2eV
E. ±12.09eV

Correct Answer: E


The correct answer is (E). Also using Bohr's equation we have ΔE = E3 - E1. The answer is +12.09 eV, therefore the electron releases energy.

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