In the modern quantum-based atomic theory, what is the name given to a particular space around the nucleus in which an electron moves?

a good one-

-In orbital mechanics, mean motion (represented by n) is the angular speed required for a body to complete one orbit, assuming constant speed in a circular orbit which completes in the same time as the variable speed, elliptical orbit of the actual body.

the correct answer to this question is 2

answerto predict;