The radius of third bohr orbit is:
Correct answer: A. 0.529 * 3^2 Å
- A. 0.529 * 3^2 Å
- B. 0.529 * 2^2 Å
- C. 0.529 * 4^2 Å
- D. 0.529 Å
Explanation
This is the correct answer. According to Bohr's model, the radius of an electron's orbit in a hydrogen atom is given by:rn = n^2 * a0where:rn is the radius of the nth orbitn is the principal quantum number (1, 2, 3, ...)a0 is the Bohr radius (5.29 * 10^-11 m or 0.529 Å)For the third Bohr orbit (n = 3):r3 = 3^2 * 0.529 Å = 9 * 0.529 Å = 4.761 ÅTherefore, the radius of the third Bohr orbit is 0.529 * 3^2 Å.
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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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