The position of electrons in atoms can be explained by the wave function of Schrödinger equation (Y).
Completion of Y obtained 3 Numbers:
1. Main quantum number (n)
     · Indicates electron energy levels (skin)
     · Value of principal quantum number ranging from 1 to infinity
     · Orbit where the electrons move is called the skin

2. Quantum Numbers Azimuth (l)
     Shows the electron energy subtingkat (subshell) l = 0, , until the (n 1)
3. Magnetic quantum number (m)
     Shows the orbital m = – l, , to +
4. Spin quantum number (ms)
     Indicate the direction of turn on its axis (spin)
     S = + ½ or =
     S = ½ or =

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