Which of the following is an example of a substance that absorbs a specific frequency of electromagnetic radiation?
A.
Helium gas at room temperature
B.
Electron in H atom moving to a higher energy level
C.
Neon gas under low pressure
D.
Nitrogen gas at high temperature
Exam No：AP Chemistry Problem Set 1 Year：2024 Question No：APChemistry2024AP0065
Answer:
B
Knowledge points:
3.11 Spectroscopy and the Electromagnetic Spectrum
Solution:
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