3. Homework 4.3
   
   1. Describe the Bohr model of the hydrogen atom.
      
   2. a) How are the wavelength and frequency of electromagnetic radiation related?
      b) How are the energy and frequency of electromagnetic radiation related?
      c) How are the energy and wavelength of electromagentic radiation related?
      
   3. Distinguish between the ground state and an excited state of an atom.
      
   4. According to the Bohr model of the hydrogen atom, how is hydrogen's emission spectrum produced?
      
   5. Determine the frequency of light with a wavelength of 4.257 x 10-7 cm.
      
   6. Determine the energy in joules of a photon whose frequency is 3.55 x 1017 Hz.
      
   7. a) Which has a longer wavelength, green or yellow light?
      b) Which has a higher frequnecy, an X ray or a microwave?
      c) Which travels at a greater speed, ultraviolet or infrared light?
      

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