1. Data before yesterday’s group work
Warm-up:
Data before yesterday’s group work
Grade Distribution by Bell a/o Oct. 16th
A (4 pts)
B (3 pts)
C (2 pts)
D (1 pt)
E (0) b1 5 12 1 4 b2 3 11 6 2 b4 10 b5 7
1) Which bell performed best on the quiz?
2) Which bell performed worst on the quiz?
3) What % of students have a B in your bell so far?
4) What can YOU do to improve your Science grade?

2. T. Trimpe 2008 http://sciencespot.net/
Bonding Basics
8th Grade Science
T. Trimpe

3. Ionic Covalent Metallic
Types of Bonds
Ionic
Covalent
Metallic

4. Warm-Up: Complete using a periodic table to help you.

5. ION NEGATIVE POSITIVE CATION ANION
An atom that gains or loses one or more electrons is called an ____________.
Atoms that gain one or more electrons will have a ____________________ charge.
An atom that loses one or more electrons will have a ____________________ charge.
A positive ion is called a ______________ and a negative ion is called an _______________.
NEGATIVE
POSITIVE
CATION
ANION
“An-Eye-On”
“Cat-Eye-On”

6. Ionic Bonds
Atoms xfer one or more ________________ to another to form a bond.
Each atom is left with a ________________ outer shell.
Forms between a ___________ ion with a positive charge and a ________________ ion with a negative charge.
Ex: Sodium + Chlorine
ELECTRONS
COMPLETE
METAL
NONMETAL

7. Example B3: Potassium + Iodine Example B4: Sodium + Oxygen
Example B5: Calcium + Chlorine Example B6: Aluminum + Chlorine

8. Co-Valent Bonds
Atoms ___________ one or more electrons with each other to bond.
Each atom is left with a ________________ outer shell.
Forms between two _________________atoms.
Ex: 2 Hydrogen + Oxygen
(water molecule)
SHARE
COMPLETE
NONMETAL

9. Example C3: Chlorine + Chlorine Example C4: Oxygen + Oxygen
Example C5: Carbon + 2 Oxygen Example C6: Carbon + 4 Hydrogen

10. Ionic Covalent Metallic
Types of Bonds
Ionic
Covalent
Metallic

11. Metallic Bonds Metal-to-Metal e-’s “swim” Metals:
Malleable (can be hammered flat)
Ductile (can be stretched)
Good Conductors (electr. & heat)

12. LEWIS DOT Diagrams

14. Covalent Bond
Ionic Bond

15. more Ionic Bonds

16. more Covalent Bonds