What happens after death?

[Bridge]

I am certain I am at least 50% wrong, but quantum theory suggests that in some cases it is more useful to think of particles as waves because in order to ascertain their position you must waive the ability to ascertain their momentum (Uncertainty principle). The result is that for particles where you must know the momentum, like electrons, thinking of them as waves means you can know their momentum and somewhat accurately predict their position, because waves are regular. But there is no such thing as a a single particle being a wave, is there? I thought that waves were a collection of particles, uniformly spread.

Is that right? As I said, I am not confident of my knowledge of particles.