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Electron Orbitals and their Order

A guide to completing an electron orbital diagram with 24 electrons and naming each with its unique quantum number.
by

sam zastrow

on 14 January 2013

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Transcript of Electron Orbitals and their Order

ELECTRON ORBITALS AND THEIR ORDER 1s 2s 2p 3s 3p 4s 3d This is a Blank Electron Orbital Diagram and theoretically, this continues forever . . . 1s 2s 2p 3s 3p 4s 3d Let's Fill It Out With 24 Electrons! We Begin Here at 1s Start With Up End With Down Then 2s Then 2p Then 3s When there is more than one electron platform, we draw all the arrows that point up first. Then 3p Then 4s If you've been counting, we now have a total of 20 electrons. This is where things get interesting . . . Here comes Let's add our final electrons! 21 22 23 24 BUT WAIT! Look at how empty this is! Electrons really don't like this! HEY! I can help! I'll jump up there and join the big leagues and become a 3d electron! That way both 4s and 3d are half full instead of 3d being 2/5 full because for some reason I really don't like that! Ahhhh :)
I feel so much better :) 1s 2s 2p 3s 3p 4s 3d Phew! Now that that's done, let's label each unique electron with four quantum numbers! n=
l=
m =
m = l s n=
l=
m =
m = l s n=
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m = l s This Is How They Work:
Principal Quantum Number (n): n = 1, 2, 3, …, ∞
Shape of the Subshell (l): l= 0 (s), 1 (p), 2 (d), ..., ∞
Magnetic Quantum Number (m ): m = ∞, ..., -l, 0, +l, ..., ∞
Spin Quantum Number (m ): m = +½ or -½. l l s s 1
0
0
+1/2 1
0
0
-1/2 2
0
0
+1/2 2
0
0
-1/2 2
1
-1
+1/2 2
1
-1
-1/2 2
1
0
+1/2 2
1
0
-1/2 2
1
+1
+1/2 2
1
+1
-1/2 3
0
0
+1/2 3
0
0
-1/2 3
1
-1
+1/2 3
1
-1
-1/2 3
1
0
+1/2 3
1
0
-1/2 3
1
+1
+1/2 3
1
+1
-1/2 4
0
0
+1/2 3
2
-2
+1/2 3
2
-1
+1/2 3
2
0
+1/2 3
2
+1
+1/2 3
2
+2
+1/2 - Sam Zastrow Why does hamburger have lower energy than steak?
Because it's in the ground state. Two atoms are walking down the street one day, and one of them says to the other:
"Hey, wait up a second. I think I lost an electron"
The first atom replied, "Are you sure?"
The second atom exclaimed, "Yes, I'm positive!"
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