DEVELOPMENT OF A NEW ATOMIC MODEL

I.Behavior of electrons related to absorption and emission of light
†††††††† A.____________________: taking in energy
†††††††† B.____________________: giving off/releasing energy

II.Properties of light
†††††††† A.  Light as a wave
††††††††††††††††† 1.
Light = form of electromagnetic (EM) radiation
††††††††††††††††† 2.All types of EM radiation together make up the EM ___________________
            †††††††††††††††† a.all types move at the speed of light (c = 3.00 x 108 m/s)
            †††††††††††††††† b.all have ____________________ (distance between same pt. on different waves -
                 ††††††††††† †††††measured in ____ - abbreviated ____)
            †††††††††††††††† c.all have ____________________ (# of waves that pass a certain point in 1 sec. -
                 ††††††††††† †††††measured in ____ - abbreviated ____)
            †††††††††††††††† d.c =
l . n
               †††††††††††††††††††† e.
frequency and wavelength are ___________________ proportional

III.Photoelectric effect
†††††††† A.Emission of e- from a metal when light shines on the metal
  
     †† B.Only light of certain frequency could cause the photoelectric effect
  
         †††††††††† 1.Wave theory alone could not explain this
  
         †††††††††† 2.Light as particles
                †††††††††††††††††† a.
Object emits energy in small, specific amounts (called ______________)
  
             †††††††††††††††††† b.Suggested by ____________________
                †††††††††††††††††† c.
E = h .
n
                    ††††††††††††††††† 1)E =
                    ††††††††††††††††† 2)h =
                    ††††††††††††††††† 3)
n =
              †††††††††††††† d.energy and frequency are ____________________ proportional
  
     †† C.Einstein suggested that light had properties of both waves and particles
  
          †† Referred to as the ________________________________________ of light
  
    ††† D._________________: particle of EM radiation carrying a quantum of energy

IV.Hydrogen atom line emission spectrum
      ††† A.____________________:lowest energy state of an atom
  
      B.____________________:atom has higher potential energy than in ground state
  
      C.Light (of a certain amount of energy) shone through a prism, separated into
†††††††† †††† specific frequencies of light (corresponds to different colors)
  
     †† D.Quantum theory
            †††††† 1.
When atom falls from excited state to ground state, __________________
††††††††† †††††††††
†††† ____________________________________________________________
               ††††††† 2.
Energy of photon = difference ___________________________________
†††††††††
†††††††† †††† ____________________________________________________________
  
            ††††††† 3.Energy states of atoms are fixed

V.Bohr model of the hydrogen atom
  
   †††† A.said that e- circled the nucleus in fixed paths
  
     †† B.when in path, has fixed amount of energy
  
     †† C.e- cannot exist in space between paths
†††††††† D.drawback of Bohrís model =

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