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Bohr radius for single electron orbits

  1. Mar 10, 2007 #1
    for ions with more than one proton ie. He+, Li2+ and Be3+, doesn't the extra charge factor into the equation? because it seems only the elementary charge is used, hence rendering it independent of amount of positive charge present.
  2. jcsd
  3. Mar 10, 2007 #2


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    Staff: Mentor

    Yes. For ions with a single electron but [itex]Z[/itex] protons, replace [itex]e[/itex] with [itex]Ze[/itex], where [itex]e[/itex] is the unit charge [itex]1.60 \times 10^{-19}[/itex] C.

    Most textbooks do the derivation with hydrogen in mind, and later make the above correction for heavier, hydrogen-like ions.
  4. Mar 10, 2007 #3
    got it. thanks for the quick reply!
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