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Homework Help: Uncertainty Principle and minimum kinetic energy

  1. Dec 8, 2009 #1
    An atom represents a region about 1.7 10-10 m wide in which an electron is confined. Use the Heisenberg uncertainty principle to estimate the minimum kinetic energy of the electron, expressing your result in electron-volts (eV).

    So I got the problem right when I analyzed the atom as a 1 d region. How will this change if it is a 3d region? I found minimum momentum=h/[tex]\Delta[/tex]x
    and then used the equations KE=p^2/2m...
  2. jcsd
  3. Dec 8, 2009 #2


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    Can you write p2 in terms of px, py, and pz?
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