Bilangan kuantum

Bilangan kuantum magnetik (m).
l = 0 => m = 0
l = 1 => m = -1,0,1
l = 2 => m = -2,-1,0,1,2
l = 3 => m = -3,-2,-1,0,1,2,3
Bilangan kuantum spin (s)
- Jika 1 kotak isi 1 maka 1/2
- Jika 1 kotak isi 2 maka -1/2
Contoh :
tentukan ke-4 bilangan kuantum unsur berikut :
1. 8O = 1S2 2S2 2P4
n = 2
l = (P) = 1
m = ll l l
-1 0 1
maka m = -1 (karena -1 isinya 2)
s = -1/2
2. 11Na = 1S2 2S2 2P6 3S1
n = 3
l = 0
m = l
0
maka m = 0
s = 1/2
3. 17Cl = 1S2 2S2 2P6 3S2 3P5
n = 3
l = 1
m = ll ll l
-1 0 1
maka m=0 (karena 2 terakhir di no 0)
s = -1/2
4. 20Ca = 1S2 2S2 2P6 3S2 3P6 4S2
n = 4
l = 0
m = ll
0
maka m = 0
s = -1/2