1. Chemical Bonds
Wednesday, November 29th, 2017

2. Why do we bond?
The number of valence electrons determines the types of bonds an atom will form
Chemical bonds are an atom’s attempt to fill an electron shell (get a stable octet)

3. Ionic Bond Usually forms between a metal and nonmetal
Transfer of electrons
Cation + Anion

4. Covalent Bonds Usually forms between two nonmetals
Sharing of electrons so both atoms get a full octet

5. Metallic Bonds Usually forms between two metals
Holds metals together very tightly
Electron cloud with high conductivity

6. Properties of Covalent Compounds
1)  Covalent compounds generally have much lower melting and boiling points than ionic compounds. 
2)  Covalent compounds are soft and squishy (compared to ionic compounds, anyway).

7. Properties, Cont’d
3)  Covalent compounds tend to be more flammable than ionic compounds.
There are exceptions to this rule!
4)  Covalent compounds don't conduct electricity in water.