3
QuizMultiple Choice

Writing and Balancing Chemical Equations — Cumulative exam

Question 3 • IA-Chemistry A Survey of Chemistry A

An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which statement describes the most likely result?

Answer
A
The energy absorbed in the first move equals the energy released in the second move.
B
The energy absorbed in the first move is greater than the energy released in the second move.
C
The energy released in the first move equals the energy absorbed in the second move.
D
The energy released in the first move is greater than the energy absorbed in the second move.

Explanation

The electron absorbs energy moving from level 1 to level 4. It releases energy moving from level 4 down to level 2. Because level 2 is higher in energy than level 1, the drop from level 4 to level 2 is smaller than the rise from level 1 to level 4. Therefore, the energy absorbed is greater than the energy released; the correct choice is B.

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