1. Aluminum Ion CrO42- Ammonium ion Bromide ion Ba+2 Carbonate ion Cr+2
Warm Up Naming Ions:
           
Aluminum Ion
CrO42-
Ammonium ion
Bromide ion
Ba+2
Carbonate ion
Cr+2
Cl-
Chromium (III) ion
Oxide ion
Cobalt (II) ion
N3-
Cu+
Fluoride ion
Lithium ion
OH-
Hydrogen ion
Iodide ion I-
PO43-
Nitrate ion
Fe+3
Se2-

2. Aluminum Ion Al+3 Chromate ion CrO42- Ammonium ion NH4+ Bromide ion
Warm Up Naming Ions:
           
Aluminum Ion
Al+3
Chromate ion
CrO42-
Ammonium ion
NH4+
Bromide ion
Br-
Barium ion
Ba+2
Carbonate ion
CO32-
Chromium (II) ion
Cr+2
Chloride ion
Cl-
Chromium (III) ion
Cr+3
Oxide ion
O2-
Cobalt (II) ion
Co+2
Nitride ion
N3-
Copper (I) ion
Cu+
Fluoride ion F-
Lithium ion
Li+
Hydroxide ion
OH-
Hydrogen ion H+
Iodide ion I-
Phosphate ion
PO43-
Nitrate ion
NO3-
Iron (III) ion
Fe+3
Selenide ion
Se2-

3. Ionic Compounds Puzzle Activity
With a partner, you will try to build the ionic compounds assigned to you.
Things to think about: your completed compounds should look like rectangles/squares, and shouldn't have any open zig zig sides

4. Writing and Naming Ionic Compounds
Tuesday & Thursday, January 9th & 11th, 2018

5. Important Vocabulary
Polyatomic Ions Chemical Name Chemical or Molecular Formula Superscript Subscript
A covalently bonded group of atoms with a charge that act as one unit The name of a compound or molecule that identifies the elements in it A notation that shows what elements a compound, or molecule, contains & in what ratio those elements exist A number written above an element symbol (Ex. Cl1-) The number written below an element symbol (Ex. H2O)

6. Atoms form compounds to lower the energy of the atom. They do this by:
1. filling the outer orbitals
2. emptying the outer orbitals or
3. sharing electrons to ‘effectively’ Fill
the outer orbitals

7. Ionic Compounds - ions held by ionic bond
Two Types of Compounds - IONIC and MOLECULAR
When two or more atoms fill or empty their valence shells by the donation or acceptance of electrons, the atoms are held together by ionic charges (+/-) and they form an ionic compound. The attractive force that holds them together is an ionic bond.
Ionic Compounds - ions held by ionic bond
ALL IONIC COMPOUNDS ARE NEUTRAL
This means the sum of the charges of all ions involved must be zero (0)

8. Step #1- Cation is written first
Making Ionic Compounds = Writing ionic Formulas
Step #1- Cation is written first
Step #2 - All compounds are neutral (sum of the charges = 0)
Step #3 - Cross over and down!
Step #4- Simplify if necessary
OH-
Cl-
Fe+3
O-2
PO4-3
Ca+2
NH4+1
Na+1

9. Example #1
“The Cross Over & Down”
Ca2+
Cl -
Al3+
O2-
Ca Cl 2
Al2 O 3

10. Mg2+ Na+ Cl- O2- MgO NaCl NaCl MgO Same Charges (SIMPLIFY) Example #2
2 2
2 2
NaCl
MgO

11. “The Cross Over & Down” Polyatomic Ions Don’t Forget Parentheses!
Example #3
“The Cross Over & Down” Polyatomic Ions Don’t Forget Parentheses!
Al3+
CrO42-
Al3+
CrO42-
Al2 (CrO4) 3
Al2 CrO43

12. Complete the Practice Writing Ionic Compounds ½ Sheet

13. Writing and Naming Ionic Compounds
Tuesday & Thursday, January 9th & 11th, 2018

14. Rules for Naming Ionic Compounds:
1. The cation always comes first (dropping the word ‘ion’)
The anion name follows with its characteristic ending (again droping the word ‘ion’)
Ex) NaCl is an ionic compound made from the Sodium ion (Na+) and the Chloride ion (Cl-), therefore:
Sodium ion (cation) + Chloride ion (anion)
makes Sodium Chloride
Ex) (NH4)2SO4 is an ionic compound made from the Ammonium ion (NH4+) and the Sulfate ion (SO4-2), therefore:
Ammonium ion (cation) + Sulfate ion (anion)
makes Ammonium Sulfate

15. Iron (II) ion + Sulfate ion (vs) Iron (III) ion + Sulfate ion
As always special consideration must be given to transition metals because of the ‘d’ orbitals. The Roman Numeral that indicates the charge of the metal must be included in the name
FeSO4 (vs) Fe2(SO4)3
Iron (II) ion + Sulfate ion (vs) Iron (III) ion + Sulfate ion
Iron (II) Sulfate (vs) Iron (III) Sulfate
 It helps to first identify the ions of a compound, then write the ion names, then finish with the name of the compound.

16. “The Cheerleader Move”… Figure Out What You Started With!
Example #4
“The Cheerleader Move”… Figure Out What You Started With!
Ti2+
Cl-
Au3+
O2-
Ti Cl 2
Au2O3
Titanium (II) chloride
Gold (III) oxide

17. PRACTICE PROBLEMS: Write the name
a. K2O
b. Na3PO4
c. MgO
d. FePO4

18. PRACTICE PROBLEMS: Write the name
a. K2O Potassium Oxide
b. Na3PO Sodium Phosphate
c. MgO Magnesium Oxide
d. FePO Iron (III) Phosphate

19. Complete Practice Naming Ionic Compounds ½ Sheet