Periodic Table Study Guide -...
Transcript of Periodic Table Study Guide -...
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Periodic Table Study Guide
Determining Shells and Valence Electrons
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Periods •Each row is called a “period”
1st Period = 1 Shell
2nd Period = 2 Shells3rd Period = 3 Shells
4th Period = 4 Shells
•The elements in each period have the same number of shells
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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”.
Group 1 = 1 electron
Group 2 = 2 electrons
Group 8 = 8 electrons
Except for He, it has 2 electrons
•The electrons in the outer shell are called “valence electrons”
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3, 4, 5, 6, 7
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Transition Metals•Transition Metals have slightly different rules for shells and valence electrons.
•This is something you will learn about in High School Chemistry.
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Determine the number of shells and the number of valence electrons for:
Carbon - C2nd Period = 2 shells
4th Group = 4 valence electrons
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Determine the number of shells and the number of valence electrons for:
Sodium - Na3rd Period = 3 shells
1st Group = 1 valence electron
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NeName the element. Number of shells ?Valence electrons ?
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Ne
8th Group = 8 valence electrons
2nd Period = 2 shellsNeonName the element.
Number of shells ?Valence electrons ?
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HName the element. Number of shells ?Valence electrons ?
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H
1st Group = 1 valence electron
1st Period = 1 shellHydrogenName the element.
Number of shells ?Valence electrons ?
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BeName the element. Number of shells ?Valence electrons ?
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Be
2nd Group = 2 valence electrons
2nd Period = 2 shellsBerylliumName the element.
Number of shells ?Valence electrons ?
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SName the element. Number of shells ?Valence electrons ?
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S
6th Group = 6 valence electrons
3rd Period = 3 shellsSulfurName the element.
Number of shells ?Valence electrons ?
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KName the element. Number of shells ?Valence electrons ?
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K
1st Group = 1 valence electron
4th Period = 4 shellsPotassiumName the element.
Number of shells ?Valence electrons ?
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HeName the element. Number of shells ?Valence electrons ?
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He
8th Group = 2 valence electrons
1st Period = 1 shellHeliumName the element.
Number of shells ?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.
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worksheet.
End of Study Guide