1. Ionic compounds names and formulas
Ch 7 and Ch 9 section 2

2. Ionic Bonding – electrical attraction between large numbers of cations and anions (metals & nonmetals); forms solid crystals

3. Writing formulas & names
Writing formulas & names* *see Ch 9 section 2 for examples & more practice
Cation anion formula name
K Cl- KCl potassium chloride
Mg F MgF magnesium fluoride
Al NO Al(NO3) aluminum nitrate
Fe SO FeSO iron(II) sulfite
Fe SO Fe2(SO4) iron(III) sulfate

4. 3 properties of ionic compounds
1) Crystalline solids at room temperature *denoted by letter (c) ; 3D crystalline network; where each cation is surrounded by anions 2) HIGH MELTING POINTS! ex/ NaCl melts at 800 oC (1,474 oF) 3) Conduct electricity if dissolved in water (ions separate) & when in a molten state.

5. Get a clicker for review 

6. True or False?
The chlorine atom gains seven electrons when it becomes an ion.

7. What is the formula for sodium chloride?
NaCl
ClNa
Na7Cl1
SCl

8. What is the formula for zinc nitride? Zn2+ N3-
A) ZnN B) Zn2N C) Zn3N2
D) ZnN E) Zn2N F) ZnN3

9. What is the name given to the electrons in the highest occupied energy level?
Anions
Cations
Valence electrons
Orbital electrons

10. What is the typical charge of group 2?
Negative two
Positive two
IDK
Positive one

11. How many valence electrons does oxygen have?
None
One
Six
eight

12. True or False
A cation is positively charged because it will gain electrons to have a stable electron configuration like a noble gas.

13. True or False
The name of PbO is lead(II) oxide

14. Yes or No
The charge of an anion is negative.

15. Please make your selection
When an aluminum atom loses its valence electrons, what is the charge on the resulting ion?
a. 2+
b. 3+
c. 2–
d. 1+

16. Please make your selection
The electron configuration of a fluoride ion, F–, is
a. 1s2 2s2 2p5.
b. the same as that of the neon atom.
c. 1s2 2s2 2p6 3s1.
d. the same as that of a potassium ion.

17. What is the formula for iron(II) oxide?
Fe2O3
Fe2O2
FeO
Fe3O2

18. Please make your selection
An ionic compound is
a. electrically neutral.
b. composed of anions and cations.
c. held together by ionic bonds
d. all of the above

19. Please make your selection
Which element when combined with chlorine would most likely form an ionic compound?
a. lithium
b. phosphorus
c. oxygen
d. bromine

20. What is the formula for cobalt(II) nitrate?
A) Co3N B) Co(NO3)2 C) Co(NO3)3

21. Metallic Bonds
Metallic bonding - between metal atoms; valence electrons are shared equally in a “sea of electrons”
*This explains the properties of metals!
The valence electrons are mobile and can drift freely from one part of the metal to another.
Electrons are delocalized & gives metals Multidirectional strength (stretching & sheets)

22. Look at page 209
When a metal is subjected to pressure, the metal cations easily slide past one another (hence malleable & ductile)
Sea of electrons
Metal cation
Force
Strong
repulsions
Nonmetal anion
Metal
Ionic crystal
If an ionic crystal is struck with a hammer, the blow tends to push the positive ions close together.
The positive ions repel one another, and the crystal shatters (brittle).

23. C. A rigid array of electrons D. A sea of electrons
Which of the following models can describe the valence electrons of metals?
A. A body-centered cube
B. Octets of electrons
C. A rigid array of electrons
D. A sea of electrons