Imagine an atom made up of a proton and a hypothetical particle of dou...
KEY CONCEPT :
For ordinary hydrogen atom, longest wavelength
With hypothetical particle, required wavelength
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Imagine an atom made up of a proton and a hypothetical particle of dou...
Bohr Atom Model and Transitions
To determine the wavelength of the photon emitted during a transition of the hypothetical particle to the first excited level in an atom, we can use the Bohr atom model.
Bohr Atom Model:
- In the Bohr model, electrons revolve around the nucleus in circular orbits.
- Electrons can jump between these orbits by absorbing or emitting photons of specific energies.
- The energy levels are quantized, and the difference in energy between levels determines the energy of the photon emitted or absorbed.
Transition to First Excited Level:
- When the hypothetical particle transitions to the first excited level, it moves from a lower energy level to a higher one.
- The energy difference between the ground state and the first excited level corresponds to the energy of the emitted photon.
Calculating Wavelength:
- The wavelength of the emitted photon can be calculated using the Rydberg formula: 1/λ = R(1/n₁² - 1/n₂²), where R is the Rydberg constant, n₁ is the initial level, and n₂ is the final level.
- For the transition to the first excited level (n₁ = 1, n₂ = 2), we plug the values into the formula: 1/λ = R(1/1² - 1/2²) = R(1 - 1/4) = 3R/4.
- Therefore, the wavelength of the emitted photon is λ = 4/3R = 12/(3R) = 4R/3.
Answer Explanation:
- The correct option given is 18/(5R), which is equivalent to 3.6R.
- Comparing this value to the calculated wavelength of 4R/3, we see that the closest option is 18/(5R) = 3.6R.
- Therefore, option C (18/(5R)) is the correct answer for the longest wavelength photon emitted during the transition of the hypothetical particle to the first excited level.
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