Chemistry

Problem

An electron in a hydrogen atom falls from the fourth stationary orbit to the second stationary orbit and a photon is emitted. (Given: constant appearing in the hydrogen spectrum equation

R_{H}=1.097\times10^{7}\,\text{m}^{-1}

, Planck’s constant

h=6.63\times10^{-34}\,\text{J\,s}

, speed of light

c=3.00\times10^{8}\,\text{m\,s}^{-1}

, electronic charge

e=1.60\times10^{-19}\,\text{C}

) a. (i) Calculate the wavelength of the emitted photon. b. (ii) Determine its frequency. c. (iii) Find the energy of the photon in electron-volt.

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