1. 11/17 - 8th Grade Agenda Learning Objective: Covalent Bonding
Collect HW: Reading & Notetaking: p.97 – 99
Textbook Reading p
HW: Reading & Notetaking p.100 – 101

2. Daily Reflection
Prompt: Write 3 facts about Covalent bonds

3. Meaning of Subscript & Superscript
ctrons
A subscript tells you the ratio of ele_______ in the comp________
If no subscript is written, the number 1 is understood.
MgCl2 = 1 Magnesium ion and 2 Chloride ions
ound

4. Properties of Ionic Compounds
In general ionic compounds are hard, bri______, solids with high melting points. When melted or dissolved in water, they conduct ele_______ current.
ttle
ctric

5. Ionic Crystal aces erns
Ionic crystals are ions with sharp edges, corners, flat surf______.
They have a cubic shape because of the patt______ formed by the compound
aces
erns

6. What is a orderly, three dimensional pattern of ions or atoms in a solid called?
Crystals
Why do Crystals form patterns of particle?
Tightly bonded negative and positive ions

7. Ionic Compound – Electrical conductivity

8. What are three characteristic properties of ionic compounds?
Crystal Shape
High Melting Points
Electrical Conductivity

9. Covalent Bond
Chemical bond formed when two atoms sha_____ electron is called a covalent bond.
Covalent bonds usually form between atoms of nonme_____
In contrast, ionic bonds form when metal and nonmetal combine re
tal

10. What is a Covalent Bond?
A chemical bond formed when two atoms share electrons is called a covalent bond

11. Examples of Covalent bonds

12. What are the characteristics of Molecular Compounds (Covalent Bonds)
Lower melting point that Ionic compounds
Lower boiling point that Ionic compounds
Poor conductors of electricity

13. What is a difference between an Ionic Bond and a Covalent Bond?
In an Ionic Bond, Chemical bond is formed by atoms loose electrons and becoming ions
In Covalent Bond, chemical bond is formed when atoms share electrons

14. Ionic vs Covalent Bond
Ionic Bond
Covalent Bond

15. Is Salt (NaCl) a Ionic or Covalent Bond?
Ionic Bond

16. Is Water a Ionic or Covalent Bond?

17. What are the characteristics of Molecular Compounds (Covalent Bonds)
Lower melting point that Ionic compounds
Lower boiling point that Ionic compounds
Poor conductors of electricity

18. What is a Double Bond?
Double Bond is a covalent bond where two pairs of electrons are shared

19. What is a Triple Bond?
Triple Bond is a covalent bond where three pairs of electrons are shared

20. Polar Molecule - Water
What is the charge of the Hydrogen side of the molecule?
What is the charge of the Oxygen side of the molecule?

21. Polar vs. Non Polar Molecule

22. Why don’t water and vegetable oil mix?
Oil is nonpolar, water is polar. Nonpolar and polar compounds do not mix well together.

23. When you do laundry, what causes the nonpolar dirt to mix with the polar water?
Detergent causes the dirt and water to mix

24. Elements derived from Latin
English Name
Symbol
Latin Name
gold Au
aurum
iron Fe
ferrum
lead Pb
plumbum
mercury Hg
hydrargyrum
potassium K
kalium
silver Ag
argentum
sodium Na
natrium
tin Sn
stannum

25. What is the symbol for Gold?Au
Someone grabs your gold chain and you say A-u give me back that gold

26. What is the symbol for Silver?Ag
As I Age my hair turns silver

27. What is the symbol for Sodium?Na
Na, I don’t want any salt.

28. What is the symbol for Potassium?K
The first three letters of potassium is pot. Pots are also named Kettles

29. What is the symbol for Iron?Fe
The giant pumping iron says Fe fi fo fum.

30. Symbols you need to know for the Test
H = Hydrogen
He= Helium
Li = Lithium
Be = Beryllium
B = Boron
C = Carbon
N = Nitrogen
O = Oxygen
Na = Sodium
K= Potassium
Fe = Iron
Ag = Silver
Au = Gold