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5 th Grade Science Mrs. LaRosa www.middleschoolscience.comwww.middleschoolscience.com 2008 All images are from www.Chem4kids.comwww.Chem4kids.com.

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Presentation on theme: "5 th Grade Science Mrs. LaRosa www.middleschoolscience.comwww.middleschoolscience.com 2008 All images are from www.Chem4kids.comwww.Chem4kids.com."— Presentation transcript:

1 5 th Grade Science Mrs. LaRosa All images are from

2 Periods Each row is called a period The elements in each period have the same number of shells

3 Groups Each column is called a group Each element in a group has the same number of electrons in their outer orbital, also known as shells. Except for He, it has 2 electrons The electrons in the outer shell are calledvalence 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:

6 Determine the number of shells and the number of valence electrons for:

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18 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 End of Study Guide


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