mrs. embry 2008 all images are from

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Periodic Table Study Guide Determining Shells and Valence Electrons Mrs. Embry www.middleschoolscience.com 2008 All images are from www.Chem4kids.com

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Page 1: Mrs. Embry  2008 All images are from

Periodic Table Study Guide

Determining Shells and Valence Electrons

Mrs. Embry

www.middleschoolscience.com 2008

All images are from www.Chem4kids.com

Page 2: Mrs. Embry  2008 All images are from

Periods • Each row is called a “period”

1st Period = 1 Shell

2nd Period = 2 Shells

3rd Period = 3 Shells

4th Period = 4 Shells

• The elements in each period have the same number of shells

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Page 3: Mrs. Embry  2008 All images are from

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”www.chem4kids.com

3, 4, 5, 6, 7

Page 4: Mrs. Embry  2008 All images are from

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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Page 5: Mrs. Embry  2008 All images are from

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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Page 7: Mrs. Embry  2008 All images are from

Write your answers on your handout.

NeName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

Ne

8th Group = 8 valence electrons

2nd Period = 2 shells

NeonName the element. Number of shells ?Valence electrons ?

Page 9: Mrs. Embry  2008 All images are from

Write your answers on your handout.

HName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

H

1st Group = 1 valence electron

1st Period = 1 shell

HydrogenName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

BeName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

Be

2nd Group = 2 valence electrons

2nd Period = 2 shells

BerylliumName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

SName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

S

6th Group = 6 valence electrons

3rd Period = 3 shells

SulfurName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

KName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

K

1st Group = 1 valence electron

4th Period = 4 shells

PotassiumName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

HeName the element. Number of shells ?Valence electrons ?

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Write your answers on your handout.

He

8th Group = 2 valence electrons

1st Period = 1 shell

HeliumName 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.

Page 19: Mrs. Embry  2008 All images are from

Be sure to have all your answers

on the worksheet.

End of Study Guide