1. Polarity and Electronegativity
Tug of War
Polarity and Electronegativity

2. What does the word POLAR mean to you?
Think about it
What does the word POLAR mean to you?

3. Polar Bear North/South Poles

4. Polar Molecules

5. What is Electronegativity?
How much an atom in a molecule attracts electrons

6. Electronegativity Increases
Electronegativity Decreases

7. Polarity
Ionic bond:
A bond in which the bonding electrons in the molecular orbital are transferred.

8. Polarity Covalent bond:
A bond in which the bonding electrons in the molecular orbital are shared.

9. Polarity Nonpolar covalent bond:
A covalent bond in which the bonding electrons in the molecular orbital are SHARED EQUALLY

10. Polarity Polar covalent bond:
A covalent bond in which the bonding electrons in the molecular orbital are NOT SHARED EQUALLY

11. Electronegativity If the difference is…
less than 0.4, = nonpolar covalent.
between 0.4 and 1.7 = polar covalent
greater than 1.7 = ionic

12. Tug of War F Na H P O As Cl Atom 1 EN value # people Atom 2 Hypothesis
Observation F Na H P O As Cl

13. Atom 1
Atom 2
Electronegativity Difference
Polar
Nonpolar
Ionic?
C 2.6
O 3.4
3.4 – 2.6 = .8
Polar Covalent

14. Unit 6 Topic 6 (Polarity) notes
Agenda
Unit 6 Topic 6 (Polarity) notes
Forensics Lab!
Who kidnapped Ms. O ??

15. What are the separation techniques that you know about?
February 15, 2008
What are the separation techniques that you know about?

16. February 19, 2008
Which of the following sets will dissolve in each other?
Polar / Ionic
Non Polar / Ionic
Polar / Non Polar
Non Polar / Non Polar
Homework:
Read Electronegativity Pgs
Take NOTES on what you read.

17. Which of the following sets will dissolve in each other?
February 19, 2008
Which of the following sets will dissolve in each other?
Polar / Ionic
Non Polar / Ionic
Polar / Non Polar
Non Polar / Non Polar