Electron Configuration
[Number of
Energy States of Hydrogen
2
10
e-]
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1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6
[He] [Ne] [ ]
[Noble Gas Cores]
[
]
[
]
[
]
This is the complete address (Electron
Configuration) for all of the elements
In Class Practice Set #4
In Class Practice Set #4
1. Write out the complete electron configuration for the following elements
2. Write out the electron configuration for the following elements using a core
a) Ca
a) Pt
b) Ni
b) I
c) Br
c) Fe
d) Ba
d) Pb
3
4
In Class Practice Set #4
In Class Practice Set #4
3. Identify the following element from the give electron configuration.
4. Identify the following element from the give electron configuration.
a) 1s2 2s2 2p6 3s2 3p5
a)
b) 1s2 2s2 2p6
b)
c) [Ar] 4s2 3d10 4p3
c)
d) [Xe] 6s2 4f14 5d10 6p1
d)
[ 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 ] 6s2 4f14 5d6
[ Xe ] 6s2 4f14 5d6
[ 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 ] 5s2 4d10 5p2
[ Kr ] 5s2 4d10 5p2
[ 1s2 2s2 2p6 3s2 3p6 ] 4s2 3d9
[ Ar ] 4s2 3d9
[ 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6] 5s2 4d8
[ Kr ] 5s2 4d8
5
6
In Class Practice Set #4
5. Identify the following element from the given electron configuration.
Valence Electrons
a)
[ Xe ] 6s2 4f14 5d10 6p4
✓ Electrons in the highest energy level are called Valence
electrons
b)
1s2 2s2 2p6 3s2 3p6 4s2 3d7
✓ Valence electrons are s & p sublevel electrons only
c) [ Kr ] 5s2 4d10 5p2
✓ Maximum of 8e-
d) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10
7
Electron Dot Diagrams
Electron Dot Diagrams
✓
The Element’s symbol represents the nucleus and all
inner-level electrons
✓
Solid dots surround the symbol representing the 8 s
& p sublevel valence electrons (Highest energy level)
Electron Dot Diagrams
Examples:
Hydrogen 1e-, 1s1 configuration
Helium 2e-, 1s2 configuration
Neon 10e-, 1s2 2s2 2p6 configuration
H.
He ..
.. .
.. Ne
.. .
P
✓
“Two electrons occupy a
single atomic orbital”
✓
“One electron in each orbital of a
SubLevel before you pair up electrons.”
✓
“Electrons fill orbitals that have the
lowest energy level first.”
P
X
S
P
In Class Practice Set #4
6.
a)
b)
c)
d)
Determine the valence electrons and write out the electron dot diagram for
the following elements
[ Ar ] 4s2
Valence =
Electron Dot
Ca
[ Ar ] 4s2 3d8
Valence =
[ Ar ]
4s2
Valence =
[ Xe ]
6s2
Electron Dot
Ni
Electron Dot
Br
Electron Dot
Pb
3d10 4p5
4f14
5d10
6p2
Valence =
In Class Practice Set #4
In Class Practice Set #4
7. Determine the valence electrons and write out the electron dot diagram for
the following elements
a)
[ Xe ] 6s2 4f14 5d8
b)
[ Kr
c)
[ Ar ] 4s2 3d6
d)
] 5s2
[ Xe ]
4d10 5p5
Valence e- =
Valence
e-
=
Valence e- =
Valence
6s2
e-
=
Pt
I
Fe
Ba
8. Determine the valence electrons and write out the
electron dot diagram for the following elements
a)
[Ne] 3s2 3p5
Valence e- =
Cl
b)
1s2 2s2 2p6
Valence e- =
Ne
c)
[Ar] 4s2 3d10 4p3
Valence e- =
As
d)
[Xe] 6s2 4f14 5d10 6p1 Valence e- =
Tl
13
14
In Class Practice Set #4
In Class Practice Set #4
9. Determine the valence electrons and write out the
electron dot diagram for the following elements
a) [ Xe ] 6s2 4f14 5d6
Valence e- =
Os
b) [ Kr ] 5s2 4d10 5p2
Valence e- =
Sn
c) [ Ar ] 4s2 3d9
Valence e- =
Cu
d) [ Kr ] 5s2 4d8
Valence e- =
Pt
15
10. Determine the valence electrons and write out the electron dot diagram for
the following elements. Look them up the element symbol on the periodic
table.
a) [ Xe ] 6s2 4f14 5d10 6p4
Valence e- =
b) 1s2 2s2 2p6 3s2 3p6 4s2 3d7
Valence e- =
c) [ Kr ] 5s2 4d10 5p2
Valence e- =
d) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10
Valence e- =
16
In Class Practice Set #4
Orbital Filling Diagram
11. Fill out the orbital filling diagram for the following element:
F: 1s2 2s2 2p5
18
In Class Practice Set #4
12. Fill out the orbital filling diagram for the following element:
Ca: 1s2 2s2 2p6 3s2 3p6 4s2
19
In Class Practice Set #4
13. Fill out the orbital filling diagram for the following element:
Ni: 1s2 2s2 2p6 3s2 3p6 4s2 3d8
In Class Practice Set #4
14. Fill out the orbital filling diagram for the following element:
Se: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
21