Electrons and Energy

  1. Why do atoms gain energy when they lose electrons, and why do they lose energy when they gain electrons.

    The only explanation I found (for the first question) raises more questions. The explanation was: it takes energy to remove an electron from an atom, and atoms gain that energy. I can understand why it takes energy to remove an electron from an atom, but why does the atom gain that energy?
     
  2. jcsd
  3. Simon Bridge

    Simon Bridge 15,053
    Science Advisor
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    Law of conservation of energy.
     
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