Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Bohr Model

Electron Configuration

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N

H = 1s1

Hydrogen

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Bohr Model

Electron Configuration

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N

He = 1s2

Helium

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Bohr Model

Electron Configuration

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N

Li = 1s22s1

Lithium

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Bohr Model

Electron Configuration

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N

C = 1s22s22p2

Carbon

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Electron Configuration

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N

N = 1s22s22p3

Bohr Model

Nitrogen

Hund’s Rule “maximum number of unpaired

orbitals”.

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Bohr Model

Electron Configuration

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N

F = 1s22s22p5

Fluorine

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Bohr Model

Electron Configuration

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N

Al = 1s22s22p63s23p1

Aluminum

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

Electron Configuration

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N

Ar = 1s22s22p63s23p6

Bohr Model

Argon

H He Li C N Al Ar F Fe La

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

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Fe = 1s22s22p63s23p64s23d6

N

H He Li C N Al Ar F Fe La

Bohr Model

Iron

Electron Configuration

Energy Level Diagram

Arb

itrar

y E

nerg

y S

cale

1s

2s 2p

3s 3p

4s 4p 3d

5s 5p 4d

6s 6p 5d 4f

NUCLEUS

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La = 1s22s22p63s23p64s23d10

4s23d104p65s24d105p66s25d1

N

H He Li C N Al Ar F Fe La

Bohr Model

Lanthanum

Electron Configuration

O

8e-

• Orbital Diagram

• Electron Configuration

1s1s22 2s2s22 2p2p44

Notation

1s 2s 2p

Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

O15.9994

8

neon's electron configuration (1s22s22p6)

Shorthand Configuration

[Ne] 3s1

third energy level

one electron in the s orbital

orbital shape

Na = [1s22s22p6] 3s1 electron configuration

AA

BB

CC

DD

• Shorthand Configuration

S 16e-

Valence ElectronsValence ElectronsCore ElectronsCore Electrons

S 16e- [Ne] 3s2 3p4

1s2 2s2 2p6 3s2 3p4

Notation

• Longhand Configuration

Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

S32.066

16

Shorthand Configuration

[Ar] 4s2

Electron configurationElement symbol

[Ar] 4s2 3d3

[Rn] 7s2 4f14 5d4

[He] 2s2 2p5

[Kr] 5s2 4d9

[Kr] 5s2 4d10 5p5

[Kr] 5s2 4d10 5p6

[He] 2s22p63s23p64s23d5

Ca

V

Sg

F

Ag

I

Xe

Fe [Ar] 4s23d5