If the speed of the electron in the first Bohr orbit of the hydrogen atom is 'x' , then the speed of the electron in the third Bohr orbit is:
Correct answer: B. x/3
- A. x/9
- B. x/3
- C. 3x
- D. 9x
Explanation
In Bohr's model, the velocity of an electron is inversely proportional to the principal quantum number (v ∝ 1/n) Therefore, if the speed in the first orbit (n=1). is x, the speed in the third orbit (n=3) will be x/3.
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