Ionic Bonding: A TutorialDebbie Pugliese
Terry Hafer
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Ionic Bonding…What is it?An ionic bond is a transfer of electrons from one
atom to another.That is, electrons are removed from one atom and
added to the other to create full and empty outer shells, following the octet rule.
Example:Na+1 + Cl-1 NaCl
Animation of Ionic Bonding
Click on video to play.
Why does Ionic bonding happen?Electronegativity values will decide whether or not the
bond is an ionic bond or a covalent bond.Electronegativity essentially is a measure of an element’s
tendency to attract electrons.If the electronegativity is greater than 1.67, then the
bond is ionic. If it is less than 1.67, it is covalent.A chart of the negativities can be found on the next slide.
**NOTE: The chart listed is just an example of an electronegativity chart. In the future, values will be taken from Mr. Wolfe’s electronegativity chart for examples and quiz questions.
Example 1KClChlorine has an electronegativity of 3.00 Potassium has an electronegativity of .843.00-.84 = 2.162.16 is greater than 1.67, and therefore the
bond is ionic.
Example 2NO2The electronegativity of Nitrogen is 2.81The electronegativity of Oxygen is 3.37The electronegativity difference is .56,
therefore the bond is covalent (because it is less than 1.67).
Note: electronegativity of Oxygen does not get doubled because there are two.
Example 3MgOMagnesium has an electronegativity of
1.2Oxygen has an electronegativity of 3.53.5-1.2 =2.3The electronegativity difference is
greater than 1.67, therefore the bond is ionic
Are you ready?
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DirectionsTo signify your answer, click the blue button
below the answer you believe to be correct.Have your electronegativity sheet handy. You
will need it to answer some of the questions.
Start the quiz!
Question 1True or False:
Ionic bonding is the transfer of electrons from one atom to another.
True
False
Correct! Good Work!
Next Question
I’m sorry. Your answer is incorrect.
Remember: Ionic Bonding is the transfer of electrons
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Question 2NaFThe electronegativity of Sodium is .96The electronegativity of Fluorine is 4.00The electronegativity difference is 3.04Is the bond ionic or covalent?
Ionic Covalent
Question 3What is the electronegativity difference of
CaS2?
a. 3.90
b. -3.90
c. 1.44
d. -1.44
Question 4Is the bond of BaCl2 ionic or covalent?
Ionic Covalent
Question 5Is the bond of CO2 ionic or covalent?
Ionic
Covalent
I’m sorry, your answer is incorrect.
Remember, an ionic bond happens when the electronegativity difference is greater than
1.67, and if the electronegativity difference is less than 1.67, the bond is covalent.
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I’m sorry. Your answer is incorrect.Remember: the electronegativity difference is the larger number minus the smaller one. It
should only be a positive number. The number should not be doubled if there are two of
them.
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I’m sorry. Your answer is incorrect.An ionic bond has an electronegativity
difference of greater than 1.67 whereas a covalent bond has an electronegativity
difference of less than 1.67.
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I’m sorry. Your answer is incorrect.An ionic bond has an electronegativity
difference of greater than 1.67 whereas a covalent bond has an electronegativity
difference of less than 1.67.
Click here try again
Correct! Good Work!
Next Question!
Correct! Good Work!
Next Question!
Correct! Good Work!
Next Question!
Correct! Good Work!
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Congratulations!You now have a better understanding of Ionic
Bonding. Good luck with your Chemistry studies.
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