Speed of the electron after the collision

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SUMMARY

The discussion focuses on the speed of an electron after colliding with an atom, where the electron initially travels at 5.50×106 m/s. The collision excites the atom from its ground state (0 eV) to an excited state with an energy of 3.50 eV. By applying the principle of conservation of energy, the initial kinetic energy of the electron is equal to the sum of its final kinetic energy and the energy transferred to the atom. This establishes a clear relationship between the initial and final speeds of the electron post-collision.

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  • Familiarity with the concept of energy conservation
  • Basic knowledge of atomic energy levels
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  • Study the conservation of energy in elastic and inelastic collisions
  • Learn about kinetic energy calculations for subatomic particles
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An electron with a speed of 5.50×10^6 m/s, collides with an atom. The collision excites the atom from its ground state (0eV) to a state with an energy of 3.50eV


What is the speed of the electron after the collision?


Dont know where to start.
 
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Well how much of the initial energy of the electron is transferred to the atom to cause the excitation?
 
Conservation of Energy:

KE_e_i = KE_{e_{f}} + E_{atom} assuming that the atom is initially at rest.
 

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