String theory is indeed a candidate for a theory of everything, as it attempts to unify quantum mechanics and general relativity. However, it is important to note that string theory is still a work in progress and has not yet reached a definitive formulation or made specific experimental predictions that can be tested.
One of the challenges in using string theory to explain the specific position of an electron in an atomic orbital, for example, is that string theory describes the fundamental particles as vibrating strings, rather than point-like particles. This introduces complexities in the mathematics and makes it difficult to directly relate string theory to specific observable phenomena at the level of atomic orbitals.
Furthermore, quantum mechanics, which governs the behavior of particles at the atomic and subatomic scales, introduces inherent uncertainties and probabilistic nature. The Heisenberg uncertainty principle, for instance, states that there are inherent limits to the precision with which certain pairs of physical properties, such as position and momentum, can be known simultaneously.
While string theory aims to provide a framework that encompasses quantum mechanics, it has not yet yielded a definitive formulation that can fully explain the specific outcomes of quantum phenomena or precisely predict the behavior of individual particles in complex systems.
It is important to emphasize that scientific understanding is an ongoing process, and the development and refinement of theories like string theory are subject to further advancements. Scientists continue to explore various approaches to bridge the gap between string theory and observable phenomena, but at present, the theory has not provided definitive answers or precise predictions at the level of specific positions of particles in atomic orbitals.