1. Monday, November 9, 2015
Bell Ringer:
Define electronegativity.
a measure of the ability of an atom in a chemical compound to attract electrons.
On the periodic table, where are the LEAST/MOST electronegative elements found?
Least-Bottom left Most-Top right
EQ: What are the rules for writing and naming stable ionic formulas?

2. Chemical Bonding Vocabulary (Ch. 7 & 8)
Word
Definition
My Own Words
Pic. Or Ex.
Chemical formula
Covalent bond
Ionic bonds
Ionic compounds
Diatomic molecule
Double covalent bond
Polyatomic ion
Octet rule
Single covalent bond
Triple covalent bond
Valence electrons

3. CHEMICAL BONDING
To play the movies and simulations included, view the presentation in Slide Show Mode.

4. Chemical Compounds
Atoms of elements are not chemically stable until they have 8 valence electrons (octet rule).
Atoms gain, lose, or share electrons with other atoms to become chemically stable (8 valence electrons)
The action taken by the electrons determine the type of bond formed
Transferred  ionic bond
(gain/lose)
Shared  covalent bond

5. Introduction to Chemical Bonds
TWO basic forms of bonding:
Ionic—transfer of 1 or more electrons from one atom to another (one loses, the other gains) forming oppositely charged ions that attract one another
Covalent—some valence electrons shared between atoms
Most bonds are not perfectly ionic or covalent.

6. The type of bond can usually be calculated by finding the difference in electronegativity of the two atoms that are going together.

7. Electronegativity Difference
If the difference in electronegativities is between:
1.7 to 4.0: Ionic
0.0 to 1.7: Covalent
Example: NaCl
Na = 0.9, Cl = 3.0
Difference is 2.1, so
this is an ionic bond!

8. Is the first element a metal?
Compounds
Is the first element a metal?
No, the first element is not a metal.
Yes
It’s Ionic!
Is H is the positive ion? No
Metals: Groups I & II, or B or Al
Metals: Transition and all others
Polyatomic ions
Acidic Compound
Covalent Compound

9. IONIC
BONDING

10. Ionic Compounds
Ionic bonds form from the attractions between oppositely charged ions.
Metal + Nonmetal
Metals tend to lose electrons to become positively charged (cations)
Nonmetals tend to gain electrons to become negatively charged (anions)

11. QR Code Activity-ExampleF K
Dot Diagrams
(show valence electrons)

12. QR Code Activity-Example+ _ K F
The ionic bond is the attraction
between the positive K+ ion
and the negative F- ion

13. QR Code Activity-ExampleKF
Put the symbols together and you
have the chemical formula

14. Naming Ionic CompoundsKF
For the first element, use the full element name
Potassium
For the second element, change the ending to “-ide”
Fluoride
Potassium Fluoride

15. Label your Periodic Table:

16. Determine the chemical formulas by balancing the charges.
Bonding pair
Cation
Anion
Balance Charges
Formula
Name
Sodium and Chlorine
Calcium and Fluorine
Aluminum and Oxygen

17. Special Ions Transition Metals Can have more than one charge
Ex: Cu+ and Cu2+
Ex: Fe2+ and Fe3+
Use a Roman Numeral in the name to show the charge
copper(I) and copper(II)
iron(II) and iron(III)

18. Transition metals
Use a roman numeral to indicate the charge of the metal for all metals other than Groups 1 & 2 and Aluminum.
Example: Copper & Oxygen
Cu +1 O
Cu +2
Cu +3

19. QR Codes!

20. 1. What is the name for NaCl?
A. sodium chloride B. sodium chlorine C. sodium I chloride

21. 2. What is the correct formula for iron (III) chloride?
A. FeCl B. Fe3Cl C. FeCl3

22. 3. What is the correct formula for Al+3 and Cl-1?
A. Cl3Al B. AlCl C. AlCl3

23. 4. What is the name for CaF2?
A. calcium fluoride B. calcium II fluorine C. calcium II fluoride

24. 5. What is the correct formula for compound formed when a sodium ion combines with a fluoride ion?
A. NaF2 B. NaF C. Na2F

25. 6. What is the correct formula for copper (II) chloride?
A. CuCl B. Cu2Cl C. CuCl2

26. 7. What is the correct formula for calcium oxide ?
A. CaO2 B. CaO C. Ca2O

27. 8. What is the name for MgS?
A. magnesium II sulfide B. magnesium sulfur C. magnesium sulfide

28. 9. What is the correct formula for silver (I) chloride?
A. SiCl B. AgCl C. AgCl3

29. 10. What is the formula formed by a potassium ion and a sulfur ion?
A. K2S B. KS C. KS2

30. 11. What is the compound formed from Ca +2 and F-1?
A. calcium fluoride B. calcium II fluorine C. calcium II fluoride

31. 12. What is the formula formed by Li +1 and O-2?
A. Li2O B. LiO C. LiO2

32. Monday, November 9, 2015
Bell Ringer:
Define electronegativity.
a measure of the ability of an atom in a chemical compound to attract electrons.
On the periodic table, where are the LEAST/MOST electronegative elements found?
Least-Bottom left Most-Top right
EQ: What are the rules for writing and naming stable ionic formulas?
The positive and negative charges must be balanced.
Change the ending of the nonmetal’s name to “-ide”.