Quantum Numbers Worksheets Page 2
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The fourth Quantum Number is “s” or
“m
”
s
SPIN- “s” quantum number
in order for electrons to occupy same
orbital (same charge-repel) they must be
spinning in opposite directions
each electron is given a spin number-
random
the first electron in the orbital is given + ½
and the second is given - ½ or visa versa
-
-
s= + ½ or - ½ = 1 e
± ½ = 2 e
5
You try…
• WRITE THE QUANTUM NUMBERS FOR EACH
ELECTRON IN Nitrogen...
n
l l l l
m
s
1
0
0
±1/2
2
0
0
± 1/2
1
-1, 0, +1
+
or – ½, + or – ½ , + or – ½
• Try writing the quantum numbers for Potassium-
6
Finishing Quantum Numbers
• Write the quantum numbers for Potassium
l l l l
m
n
m
l l l l
s
± ± ± ± 1/2
1
0
0
± ± ± ± 1/2
2
0
0
± ± ± ± 1/2, ± ± ± ± 1/2, ± ± ± ± 1/2
1
-1, 0, +1
± ± ± ± 1/2
3
0
0
± ± ± ± 1/2, ± ± ± ± 1/2, ± ± ± ± 1/2
1
-1, 0, +1
*
2
-2, -1 , 0 , +1, +2
+1/2 or –1/2
*Note= since the l l l l = 2 sublevel only needs one orbital you need only write
–2 or all of them shown empty
Page 2
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