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Answer: Quantum numbers are used to describe the position of an electron in an atom. Explanation: Quantum numbers can be used to describe the exact location of an electron. There are four quantum numbers: n - describes the energy level. â - describes the subenergy level (0 to n-1 ) mâ - describes the orbital ( -â to +â ) ms - describes the spin (clockwise or anti clockwise : -Â½ or +Â½) Ramith Hettiarachchi Â· Â· 22 comments Â· Jun 23 2014.
Since the quantum numbers m and l are zero for n =1, the pair of electrons in the helium orbital have the values (n, l, m, s) = (1,0,0,+1) and (1,0,0,â1)â that is, they differ only in spin. These two sets of quantum numbers are the only ones that are possible for a n =1 orbital. given orbital is characterized by a fixed set of the quantum numbers n, l, and m. The electron spin itself constitutes a fourth quantum number s, which can take the two values +1 and â1.