The quantum mechanical approach to atomic structure permits the calculation of 1. the most probable distance between any two specified electrons. 2. a region about the nucleus in which an electron of specified energy will probably be found. 3. the most probable radius of an orbit that an electron of specified energy will follow. 4. the most probable spin value that will be associated with an electron of specified energy. 5. the number of electrons in an atom.

2. a region about the nucleus in which an electron of specified energy will probably be found

Explanation:

With quantum mechanics we can find the wave function that describes the movement of the particles, the interpretation of this wave function is through the probability density (φ* φ).

This probabilistic interpretation of the energies, position and amounts of motion electrons allow us to find the region around the nucleus where an electron of specific energy can be found with a given probability.

The correct answer is 2

explanation:

a fuel engine ( known as a gasoline engine in american english )is an internal combustion engine with spark ignition, designed to run on petrol (gasoline) and similar volatile fuels.