1. Polar, Non-Polar & Hydrogen Bonds
Packet #19

2. Types of Chemical Bonds
Polar Bond
Types of Chemical Bonds
Saturday, December 29, 2018Saturday, December 29, 2018

3. Remember…

4. Bond Polarity & Chemical Bonds
Bond Polarity is due to differences in electro-negativity
Bond polarity can predict the polarity of a bond
∆EN < 0.4 = non-polar covalent
∆EN between 0.4 and 2.0 = polar covalent
∆EN > 2.0 = ionic
δ used to indicate partial charges
Dipole movement is the measure of a molecule’s overall polarity
μ = Q (charge) * r (distance)
More details to come in Organic Chemistry

5. Polar Bond
A polar bond is formed because one atom, of the compound, being more electronegative grabs more electron density from another atom.
The electronegative atom attempts to steal electrons.
Saturday, December 29, 2018Saturday, December 29, 2018

6. Types of Chemical Bonds
Non-Polar Bonds
Types of Chemical Bonds
Saturday, December 29, 2018Saturday, December 29, 2018

7. Non-Polar Bond Joining of atoms with the same electronegativity
Saturday, December 29, 2018Saturday, December 29, 2018

8. Types of Chemical Bonds
Hydrogen Bonds
Types of Chemical Bonds
Saturday, December 29, 2018Saturday, December 29, 2018

9. Hydrogen Bonds
A strong non-bonding interaction that causes a quick, weak “chemical bond.”
Occurs when a hydrogen atom, attached to a highly electronegative atom, interacts with a lone electron from a nearby electronegative atom.
These bonds are broken almost immediately
Depends on temperature.
Saturday, December 29, 2018Saturday, December 29, 2018

10. Hydrogen Bond
Although hydrogen bonds are weak, the vast number of them in large molecules makes them collectively significant
The formation of water in various forms.
12/29/2018 6:21:19 AM

11. Phases of Matter Liquid Solid Gas
Elements and molecules can exist in all three phases
Saturday, December 29, 2018Saturday, December 29, 2018

12. Phases of Matter II
Saturday, December 29, 2018Saturday, December 29, 2018

13. Van der Waals Forces

14. Review