Gold is yellow because of the way its electrons behave.

Electrons in metals also behave as if they were free.

Real electrons clearly do not behave in this way.

The electron behaves "as though it were spinning about an axis".

So, under the right circumstances, that single electron can behave as if it had the spin effect of 200 electrons.

An electron in a metal normally behaves as a free particle.

The electrons behaved differently at the surface of the non-metal.

Another important fact of quantum mechanics is that the electron behaves in a very weird way.

This is actually how an electron behaves and we say it is a spin-1/2 particle.

This analogy holds as an electron indeed behaves like a tiny bar magnet.