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66 solutions

Bohr and Balmer Equations

Q. Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 5 to n = 1.

Solved • Mar 24, 2020

Bohr and Balmer Equations

Q. What is the frequency of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 6 to level n = 4? (c=3.00×108 m/s, h=6.63×10-34 J·s, RH=2.179×10-18 J)

Solved • Mar 22, 2020

Bohr and Balmer Equations

Q. 7. What is the energy of a photon in J emitted by the transition from ni = 5 to the nf = 1 of a hydrogen atom?

Solved • Feb 28, 2020

Bohr and Balmer Equations

Q. 6. What is the energy of a photon in J emitted by the transition from the ni = 4 to the nf = 2 of a hydrogen atom?

Solved • Feb 28, 2020

Bohr and Balmer Equations

Q. A hydrogen atom absorbs a photon of visible light and its energy enters the n= 4 level. Calculate (a) the change in energy of the atom and (b) the wavelength (in nm) of the photon.

Solved • Mar 19, 2020

Bohr and Balmer Equations

Q. Using the Rydberg equation calculate the wavelength of the photon emitted when a hydrogen atom undergoes a transition from n = 5 to n = 2.

Solved • Mar 19, 2020

Bohr and Balmer Equations

Q. An astrophysicist working at an observatory is interested in finding clouds of hydrogen in the galaxy. Usually, hydrogen is detected by looking for Balmer series of spectral lines in the visible spectrum. Unfortunately, the instrument that detects hydrogen emission spectra at this particular observatory is not working very well and only detects spectra in the infrared region of electromagnetic radiation. Therefore, the astrophysicist decides to check for hydrogen by looking at the Paschen series, which produces spectral lines in the infrared part of spectrum. The Paschen series describes the wavelengths of light emitted by the decay of electrons from higher orbits to the n = 3 level. What wavelength λ should the astrophysicist look for to detect a transition of an electron from the n = 7 to the n = 3 level? Express your answer with the appropriate units.

Solved • Feb 13, 2020