Periodic Table and Electron Configuration Worksheet
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Periodic Table & Electron Configuration Worksheet
Use the periodic table and the steps below to determine electron configuration of the elements below using
noble gas notation.
Step #
Process
Example
1
Find the element on the periodic table.
bromine
2
Find the noble gas that comes before the element.
argon
3
Determine which period the element is in.
period 4
4
Write the electron configuration using noble gas notation. Start
with the noble gas in brackets and then list the energy sublevels
(main energy level and orbital block) that are filled up as you move
to the right toward the element.
Main Energy Level: for the s-block and p-block , n = period #;
for the d-bock, n = period # - 1; and for the f-block, n = period # - 2.
[Ar] 4s
2
3d
10
5
When you get to the block that the element is in, count how far
into the block the element is. This will be the number of electrons
in the last sublevel.
bromine is the 5
th
element in the p-block,
[Ar] 4s
2
3d
10
4p
5
1. Lithium
2. Carbon
3. Oxygen
4. Neon
5. Magnesium
6. Aluminum
7. Phosphorous
8. Chlorine
9. Potassium
10. Titanium
11. Chromium
12. Iron
13. Nickel
14. Zinc
15. Germanium
16. Selenium
17. Krypton
18. Strontium
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