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DROBNJAK said:ZapperZ, >>
Semantics aside: What I thought was that electron is obvious 'perpetual motion device', not the 'machine'.
And yes, moving in shells, not orbits.
How is it moving in, say, the s-orbital? What is the angular momentum of that electron?
Device... machine... is there a difference? A device is supposed to do something, i.e. a machine.
Zz.