The number of de Broglie wavelengths that fit along the circumference of the third Bohr orbit of the hydrogen atom is:
Correct answer: A. 3
- A. 3
- B. 6
- C. 9
- D. 12
Explanation
In the Bohr-de Broglie model, an electron can occupy an orbit only if the circumference of that orbit equals an integer multiple of the electron's de Broglie wavelength: (2πr =nλ); n (the principal quantum number) is equal to the number of wavelengths that fit into the orbit. Thus, for the third orbit (n=3), three de Broglie wavelengths fit along the circumference.
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