it means the major level of orbital like 2S1, the 2 is the quantum number 3D4, the 3 is the quantum number
1p is not a valid orbital designation according to the rules for assigning quantum numbers to atomic orbitals. Orbitals are defined using the principal quantum number (n), azimuthal quantum number (l), magnetic quantum number (m), and spin quantum number (s). The orbital with n=1 and l=1 is designated as 2p, not 1p.
The four quantum numbers are: Principal quantum number (n) - symbolized as "n" Azimuthal quantum number (l) - symbolized as "l" Magnetic quantum number (ml) - symbolized as "ml" Spin quantum number (ms) - symbolized as "ms"
There are several different quantum numbers for a given atom (principle quantum number, the angular quantum number, the magnetic quantum number, the spin quantum number, etc) .I assume you are looking for the Principle Quantum number, n, which is equal to the row (period) in the period table in which the element is situated.For helium, the principle quantum number is 1.i.e. n = 1As another example; the principle quantum number for potassium (K), n = 4.
Sublevels in an atom are designated by a combination of the principal quantum number (n) and a letter that represents the type of sublevel (s, p, d, or f). For example, the s sublevel is designated as n = 1, the p sublevel as n = 2, the d sublevel as n = 3, and the f sublevel as n = 4.
3s has a principle quantum number of n=3 5s has a principle quantum number of n=5
The first quantum number is the principal quantum number, denoted by "n." In aluminum, the 3p1 electron would have a principal quantum number of n = 3, since it is in the third energy level orbiting the nucleus.
The quantum numbers of calcium are: Principal quantum number (n): 4 Angular quantum number (l): 0 Magnetic quantum number (ml): 0 Spin quantum number (ms): +1/2
The four quantum numbers for germanium are: Principal quantum number (n) Azimuthal quantum number (l) Magnetic quantum number (ml) Spin quantum number (ms)
n = 3
l=0
n = 2