1. LECTURE 2.3 – METALLIC AND COVALENT BONDS

2. What are metallic bonds?

3. Today’s Learning Target
LT 2.5 – I can define a metallic bond and explain the role of electrons in the formation of these bonds.
LT 2.6 – I can identify a compound containing a covalent bond and discuss how electrons aid in the formation of covalent bonds.

4. Chemical Bonding
Ionic Bonds
Metallic Bonds
CovalentBonds

5. I. Metallic Bonds This is a bond between metal atoms
Forms between many metal atoms, so electrons are free to jump between multiple atoms

7. II. “Sea of Electrons”
This ability to roam creates a “sea of electrons” within a metallic bond
This means that heat and charge can be easily passed between atoms in a metallic bond.
This is why metals are good conductors

9. What are covalent bonds?

10. Chemical Bonding
Ionic Bonds
Metallic Bonds
CovalentBonds

11. I. Covalent Bonding This is a bond between only non-metals.
Electrons are shared between the elements.
Most molecules in biology are covalent compounds

12. Covalent Bonds Play Well Together

13. Covalent Bonds Share!

15. II. Electronegativity and Covalent Bonding
Because electrons are not completely transferred, covalent bonds form between molecules that have similar electronegativities
This is why metals cannot form covalent bonds.

16. How do you identify compounds as ionic, covalent or metallic?

17. I. Identifying Compounds
If it is made of a metal and a non-metal, then it is an ionic
If it is made of only non-metals, then it is a covalent.
If it is made of only metals, then it is metallic.