Answer:
➣The principal quantum number, n, describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or l, describes the shape of the orbital.
➣The first quantum number describes the electron shell, or energy level, of an atom. The value of n ranges from 1 to the shell containing the outermost electron of that atom. The dynamics of any quantum system are described by a quantum Hamiltonian (H).
Explanation:
n➝the energy of an electron and the most probable distance of the electron from the nucleus
