When electrons ‘quantum leap’, the electron disappears and instantly reappears with higher energy. Where does it go?

The electron does not travel anywhere in a quantum leap. It gains energy in a way that is almost “instantaneous” in physics. It is a “leap” because it moves directly from one energy level to another energy level. However, it cannot occupy any energy between.

It sounds like you are trying to conflate it with Quantum Tunnelling

This is where an electron moves from one side to the other of a boundary, but not through it (since being within that boundary would be physically impossible). It can be viewed using the Heisenberg Uncertainty Principle. The electron does not have a precise position and it has a certain probability of being on the other side of a barrier. This is despite the fact that it would be physically impossible for it to be there.

Although the two phenomena may be related at an underlying level, the tunneling event doesn’t constitute what’s known as a “leap”. This term refers to an instantaneous, discrete energy level change.


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