As per the Bohr's second postulate, the electrons can revolve around a nucleus in only those orbits for which the angular momentum is an integral multiple of ________.
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A.
2h/π
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B.
2π/h
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C.
2πh
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D.
h/2π
Correct Answer:
D. h/2π
Explanation:
According to Bohr's second postulate, an electron can only revolve in specific stable orbits where its angular momentum is quantized. This postulate states that the angular momentum (L) must be an integral multiple of h/2p, where h represents Planck's constant. Mathematically, this is expressed as L = mvr = nh/2p, where n is the principal quantum number (1, 2, 3, ...). This condition ensures that the electron exists as a standing wave around the nucleus, preventing it from continuously radiating energy and spiraling inward. Based on the options provided in the spreadsheet, the correct answer is h/2p.
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