Nothing, there is no such thing. A number is a sign representing the concept of quantity in the real world. Mathematicians can speculate on the existence of other types of reality and physicists can see astonishing things that defy conventional description or logical analysis, but a number is simply a form of notation that describes the quantity of something on a scale that relates to the observable universe. ie ten eggs.
It doesn't have an special significance.
http://en.wikipedia.org/wiki/Quantum_number
These are: principal quantum number (n), azimutal quantum number (ł), magnetic quantum number (m), spin quantum number (sd).
3s has a principle quantum number of n=3 5s has a principle quantum number of n=5
n-1 is the max l
What are the quantum numbers of Br?
It doesn't have an special significance.
from Max Planck's theory, quantum numbers are units of energy.
All four quantum numbers i.e principle ,azimuthal or subsidiary, magnetic and spin quantum numbers are required to specify a single atomic orbital.
http://en.wikipedia.org/wiki/Quantum_number
Principal quantum numbers (n).
The first three quantum numbers (principle, angular momentum, magnetic) are all whole numbers. The last quantum number (spin) is either ½ or -½.
2s,6p,
The four quantum numbers, n, l, m1, and ms, are all solutions to Schrödinger's equation. These numbers are used to assign each electron in an atom an "address." They "uniquely characterize an electron and its state in an atom" ("Quantum Number").
How are electrons arranged in the quantum mechanical model of an atom
These are: principal quantum number (n), azimutal quantum number (ł), magnetic quantum number (m), spin quantum number (sd).
3s has a principle quantum number of n=3 5s has a principle quantum number of n=5