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First off, I am not sure if these questions belong in this category.

For a couple of years now I have been interested in physics/quantum mechanics, and a while ago I decided it was probably my main interest. After realizing my school did not offer physics, and therefore not being able to get taught what I love, I resorted to books. I am trying to teach myself as much as possible about the subject.

After reading basic 'beginner' books (the maths free ones ;)) I had a few questions. They are probably really basic, but I can't seem to turn to anyone to ask.

First off, electrons 'orbit' an atom. I read somewhere there is actually a cloud of probability of finding the electron, so then, is the electron actually orbiting if the location is pure chance?

It appears quantum mechanics is really probability based - is it really pure chance? Or is it a simple matter of finding all the inputs and environmental effects and then you can predict accurately?

Whats is 'rest mass' and what is mass that is not 'rest mass' ^^

I am only curious, thats why I ask all these questions, and I am sure people out there know the answers :)

Cheers,

Adrian

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# Rest mass, electron movement

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