1. Bellwork Thursday
On your way in, you should have received a card with an ion on it. Using your card, do the following…
Find a person or people who balance out the charge on your card and stand by them.
Write the compound you form with your group.
Name the compound.
Is your compound ionic or molecular? How do you know?

2. Ga S Br +3 C -4 Write out the Lewis dot structures for the following:
Bellwork Monday
Write out the Lewis dot structures for the following: Ga S
Br +3
C -4

3. Unit 11 Ch 7 & 8 Part 2
Ionic Bonding Continued
Metallic Bonding

4. 7.2 Ionic Bonds
Ionic Bond - A chemical bond formed by the electrostatic attraction between a cation and an anion when there is a transfer of electrons.
Ionic compounds are generally a metal and a nonmetal bonded together.

5. Example:
When potassium reacts with chlorine what kind of compound is formed?
Ionic
Is there a transfer of electrons?
Yes
Using the Lewis structures show what happens to K and Cl when they combine to form salt.

6. Properties of Ionic Compounds
High melting points
Solids at room temperature
Crystalline in structure, referred to as a crystal lattice
MP:
802°C

7. 7.3 Bonding in Metals
Metallic bonds – consist of the attraction of free-floating valence electrons for the positively charged metal ions.
These forces hold metals together
Free Floating valence e-
Positively charged metal ion

8. Properties of Metallic Compounds:
Good conductors
Ductile – can be drawn into a wire
Malleable – can be hammered into sheets or forced into shapes

9. Crystalline Structure of Metals
Metals and ionic compounds are in compact orderly patterns
Identically sized spheres have several arrangements
Simple cubic
Body-centered cubic
Face-centered cubic

10. Simple Body-centered Face- centered

11. Bonding in Metals
Alloys – mixtures of two of more elements, at least two of which are metals.
Steels are the most important alloys today
Consist of Fe, C, B, Cr, Mn, Mo, Ni, W, V
Ex: Brass, steel, 14 K gold, sterling silver, & cast iron

12. Ex #4 Cation Anion Write the compound here.
What is the name of the compound?
Is the compound ionic or covalent?