Electron Configuration

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Chapter 5

• Electron Configuration

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Electron Configuration

• 4d7

? number of electrons
Energy level ?
? sublevel
7 electrons are in the d sublevel of the 4th
energy level
3

• What is the electron configuration of H? (Z 1)

1s1
4

• What is the electron configuration of F? (Z 9)

1s2 1s22s2 1s22s22p5
5

• What is the electron configuration of Fe? (Z
  26)

1s22s22p63s2 3p64s23d6
6

• What is the electron configuration of Au? (Z
  79)

7

• What is the electron configuration of Au? (Z
  79)

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Diagonal Rule Arrow Diagram
1 2 3 4 5 6 7
s

• Steps
• Write the energy levels 1 through 7.
• Write the sublevels in s, p, d, f order.
• Draw diagonal lines from the top right to the
  bottom left.
• To get the correct order, follow the arrows!

s 2p
s 3p 3d
s 4p 4d 4f
s 5p 5d 5f
7p is as far as you will go.
s 6p 6d 6f
s 7p 7d 7f
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What is the electron configuration of Gold (Au)?
Z 79

• 1s22s22p63s23p64s23d104p65s24d10
• 5p66s24f145d9

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Homework

• Chapter 5 Worksheet Electron Configuration.