2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?
Correct answer: C. 4-times
- A. 2-times
- B. 3-times
- C. 4-times
- D. 6 times
Explanation
According to the Bohr model, the radius of an orbit is proportional to n2, so r2/r1 = 2²/1² = 4. Thus, the second orbit is four times farther from the nucleus than the first orbit. Students may choose 2-times by assuming the radius is directly proportional to n rather than n².
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About Planck's Quantum Theory
Planck's quantum theory states that energy is emitted or absorbed in discrete packets called quanta, with each packet having energy E = hν. It covers the meaning of Planck's constant, the relationship between frequency and wavelength, and how quantisation differs from the classical continuous model of energy.
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