Question

the wave mechanical models states that we can predict the path and location of an electron 100%

Answer 1

nope..

Answer 2

The wave mechanical model cannot predict the exact location of an electron.

However, it does allow you to predict the probability of where an electron may be positioned at a given time.

Answer 3

Depends on what you mean. In the purest sense, to predict the "path" of a particle means to be able to construct a list of positions of the particle at a set of times, like so:

time position
---------------
t0 x0
t0+dt x0+dx
... ....

such that dt->0 and dx->0, i.e. we have infinitely many entries in our list, spaced infinitismly apart. The uncertainty principle forbids this, since with a continuous path we could take a derivative and find the velocity, too, at each point -- and as you know, position and velocity cannot be determined simultaneously.

What would happen is that the smaller and smaller dt got -- the more and more closely spaced we made our measurements of position -- the larger dx would grow, that is the various of distance traveled with each step would increase, and the path appear more jaggedy and chaotic. We could never achieve something that looked like a classical continuous curve x(t).

The position can, ordinariy, be determined as accurately as you like, any time you
like. It's only measuring position and velocity simultaneously that the uncertainty principle forbids.