My text book says "electrons of the same spin in degenerate orbitals tend to exchange their positions and this leads to stability". Firstly, why should the electrons exchange their positions? I read somewhere that the electrons would want to exchange their positions in order to get a greater area of movement and consequently, the shielding effect by other electrons decreases. But how would exchanging of positions by electrons give them more area? Exchange of positions would basically result in the same situation as before the exchange?

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    $\begingroup$ this sounds like a weird phrasing of Pauli exclusion principle... could you point to which textbook it is and the page? $\endgroup$ – user2723984 Nov 23 '20 at 8:36
  • $\begingroup$ This seems not a very good textbook. Is there no further explanation? Can you give a reference? Here is an explanation of the exchange interaction: en.wikipedia.org/wiki/Exchange_interaction. $\endgroup$ – my2cts Nov 23 '20 at 10:21

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