Why are the orbitals of the hydrogen atom described as "probability maps"? why are the edges of the hydrogen orbitals sometimes drawn to appear "fuzzy"?

Respuesta :

orbitals are sometimes called probability maps which means that at any point in the 3D probability map the probability at a point denotes the chances of a electron to be there at a time point. 

Since hydrogen has only on electron, the probability falls equal in a sphere around the nucleus. That's why they are sometimes drawn to appear fuzzy(To show the equal probability).