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Periodic Table Study Guide Determining Shells and Valence Electrons

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1 Periodic Table Study Guide Determining Shells and Valence Electrons
5th Grade Science Mrs. LaRosa 2008 All images are from

2 Periods Each row is called a “period”
The elements in each period have the same number of shells 1st Period = 1 Shell 2nd Period = 2 Shells 3rd Period = 3 Shells 4th Period = 4 Shells

3 Groups Group 8 = 8 electrons Group 1 = 1 electron
Except for He, it has 2 electrons Group 2 = 2 electrons Each column is called a “group” 3, 4, 5, 6, 7 Each element in a group has the same number of electrons in their outer orbital, also known as “shells”. The electrons in the outer shell are called “valence electrons”

4 Transition Metals Transition Metals have slightly different rules for shells and valence electrons. This is something you will learn about in High School Chemistry.

5 Determine the number of shells and the number of valence electrons for:
Carbon - C 2nd Period = 2 shells 4th Group = 4 valence electrons

6 Determine the number of shells and the number of valence electrons for:
Sodium - Na 3rd Period = 3 shells 1st Group = 1 valence electron

7 Write your answers on your handout.
Ne Name the element. Number of shells ? Valence electrons ?

8 Write your answers on your handout.
Ne Name the element. Number of shells ? Valence electrons ? Neon 2nd Period = 2 shells 8th Group = 8 valence electrons

9 Write your answers on your handout.
Name the element. Number of shells ? Valence electrons ?

10 Write your answers on your handout.
Name the element. Number of shells ? Valence electrons ? Hydrogen 1st Period = 1 shell 1st Group = 1 valence electron

11 Write your answers on your handout.
Be Name the element. Number of shells ? Valence electrons ?

12 Write your answers on your handout.
Be Name the element. Number of shells ? Valence electrons ? Beryllium 2nd Period = 2 shells 2nd Group = 2 valence electrons

13 Write your answers on your handout.
Name the element. Number of shells ? Valence electrons ?

14 Write your answers on your handout.
Name the element. Number of shells ? Valence electrons ? Sulfur 3rd Period = 3 shells 6th Group = 6 valence electrons

15 Write your answers on your handout.
K Name the element. Number of shells ? Valence electrons ?

16 Write your answers on your handout.
K Name the element. Number of shells ? Valence electrons ? Potassium 4th Period = 4 shells 1st Group = 1 valence electron

17 Write your answers on your handout.
He Name the element. Number of shells ? Valence electrons ?

18 Write your answers on your handout.
He Name the element. Number of shells ? Valence electrons ? Helium 1st Period = 1 shell 8th Group = 2 valence electrons Helium is the exception in Group 8. Since it has just one shell, that shell can only fit 2 electrons instead of 8. It is in this group because all the elements have a full outer shell.

19 Be sure to have all your answers on the worksheet.
End of Study Guide Be sure to have all your answers on the worksheet.


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