For an atom of hydrogen, the radius of the first orbit is given by:
Correct answer: B. Option B
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
For hydrogen, the radius of the first orbit is given by the formula:r=h2 /4pi2me2where (h) is Planck's constant, (m) is the electron mass, and (e) is the electron charge.
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Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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