Final answer:
In an s orbital, the probability of finding an electron at a particular distance from the nucleus can best be determined by the quantum mechanical model.
Step-by-step explanation:
The probability of finding an electron at a particular distance from the nucleus in an s orbital can best be determined by the quantum mechanical model. In the quantum mechanical model, the electron's exact path is not defined, but rather its position is described by a probability distribution represented by a wave function. This wave function gives the probability of finding the electron at different points around the nucleus.