1. Headphones out, cell phones up.
Warm up 11/8
Assume the following elements become ions. Write the correct symbol and charge as well as if it is a cation or anion
F, S, C, Ba, Li, Se
Headphones out, cell phones up.

2. What is an ionic compound?
IONIC COMPOUND NOTES
What is an ionic compound?
An ionic compound is formed when a cation (metal) transfers electrons to an anion (nonmetal) forming an ionic bond.
chemical name
chemical formula
sodium chloride
NaCl
cation (metal)
anion
(non-metal)
metal + nonmetal = ionic compound

3. **metals want a total of 8 valence electrons (octet) to become stable
Lewis Dot Structures for Binary Ionic Compounds An ionic bond results in the TRANSFER of electrons from the metal cation to the non-metal anion
**metals want a total of 8 valence electrons (octet) to become stable
EXAMPLE #1
potassium fluoride
EXAMPLE #2
Na2S

4. Learning Check #1 Draw the Lewis dot structure for the following binary ionic compounds
calcium oxide B
K2Se

5. Writing Binary Ionic Chemical Formulas
A chemical formula represents the compound using the elemental symbols
How to write Binary Ionic Chemical Formulas:
Cation is always first, anion second
Overall oxidation number (charge) must equal ZERO!!

6. Guidelines for Assigning Oxidation Numbers ( see p
Guidelines for Assigning Oxidation Numbers ( see p. 180 for a complete list)
The oxidation of any free (uncombined) element is zero.
The oxidation number of a monatomic ion is equal to the charge of the ion.
e.g. The oxidation number of K+ is +1.
The oxidation number of each hydrogen atom is +1, unless it is combined with a metal, then it has a state of -1.
The oxidation number of fluorine is always -1.
The oxidation number of each oxygen atom in most of its compounds is -2.

7. Example: Determine the oxidation numbers for each atom in KMnO4
This compound is made up of a K+ cation and an MnO4- anion.

8. Writing Binary Ionic Chemical Formulas
EXAMPLE #1
EXAMPLE #2
EXAMPLE #3
potassium oxide
sodium chloride
lithium nitride

9. Learning Check #2 Write the chemical formula for the following binary ionic compounds
sodium fluoride
cesium sulfide
barium phosphide

10. Writing Binary Ionic Chemical Names
A chemical name represents the compound using the actual names of the elements
How to write Binary Ionic Chemical Names:
Name the cation first, anion second
Drop the ending on the anion and add “-ide”

11. Writing Binary Ionic Chemical Names
EXAMPLE #1
MgS
EXAMPLE #2
LiCl
EXAMPLE #3
K2Se

12. Learning Check #3 Write the chemical name for the following binary ionic compounds
NaF B
BeS C
RaBr2

13. Ionic Compounds and Transition Metals
Transition metals are found in Groups 3B-12B on the periodic table
The charge of the transition metal varies and depends on the element it forms an ionic bond with

14. Writing Ionic Chemical Formulas with Transition Metals
EXAMPLE #1
EXAMPLE #2
cobalt (II) sulfide
iron (II) bromide
How to write Ionic Chemical Formulas with Transition Metals:
Cation first, anion second
Charge of transition metal is in parentheses
Overall oxidation number (charge) must equal ZERO!!

15. Writing Ionic Chemical Names with Transition Metals
EXAMPLE #1
ZnCl2
EXAMPLE #2
Fe2O3
How to write Ionic Chemical Names with Transition Metals:
Transition metal first, non-metal second
Specify charge of transition metal with roman numerals in parentheses
Drop ending of nonmetal and add “-ide”

16. Ionic Compounds and Polyatomic Ions
What is a polyatomic ion? A polyatomic ion is a group of two or more atoms bound together that have a charge

17. Writing Ionic Chemical Formulas with Polyatomic Ions
EXAMPLE #1
EXAMPLE #2
sodium chlorate
calcium nitrite
How to write Ionic Chemical Formulas with Polyatomic Ions:
Metal first, polyatomic ion second
Overall oxidation number (charge) must equal ZERO!!

18. Writing Ionic Chemical Names with Polyatomic Ions
EXAMPLE #1
ZnSO4
EXAMPLE #2
K2CO3
How to write Ionic Chemical Names with Polyatomic Ions:
Metal first, polyatomic ion second
DO NOT drop the ending of the polyatomic ion