Atomic Energy: Missing Electron Impact

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Discussion Overview

The discussion revolves around the energy dynamics of an atom with one electron missing compared to a neutral atom. It explores concepts related to electrostatic forces, energy separation, and work performed during interactions between charged particles. The scope includes theoretical considerations and conceptual clarifications.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant questions why the energy of an atom with one electron missing is greater than that of a neutral atom.
  • Another participant explains that the energy of a system consisting of an ion and a distant electron is greater than that of the atom with the electron nearby, attributing this to the electrostatic attraction between the positive ion and the electron.
  • A further contribution suggests that if a neutral atom is placed between the electron and the ion, the electron will accelerate towards the ion and perform work on the atom, implying that energy must be higher when the electron and ion are separated to allow for energy transfer.

Areas of Agreement / Disagreement

Participants express differing views on the implications of energy separation and work performed, indicating that multiple competing perspectives exist without a clear consensus.

Contextual Notes

The discussion does not resolve the underlying assumptions regarding energy definitions and the conditions under which work is performed, leaving these aspects open for further exploration.

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Why is the energy of an atom with one electron missing greater than that of the neutral atom?
 
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The energy of "ion + electron far away" is greater than the energy of the atom with the electron nearby. The reason is just the electrostatic force - the positive ion attracts the electron, and you need energy to separate them.
 
Aw, thank you!
 
Consider that if you put a neutral atom in between the electron and the ion, the electron will accelerate towards the ion and impact the atom, performing work on it. When work is performed energy is transferred, so this requires that the energy of the separated electron and ion be higher than when they are together, otherwise there would be no energy to transfer in the first place!
 

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