1. Bonding and Nomenclature
Honors Coordinated Science II

2. Electron Configurations of Ions
What does an ionic charge mean for the electron configuration of an atom?

3. Simple Ionic Formulas Ionic substances typically form a crystal
Large group of oppositely charged ions arranged in a regular pattern.
Neutrally charged

4. Simple Ionic Formulas
To determine the formula of an ionic compound, you need to balance the positive and negative charges.
What is the formula for Calcium Chloride?
What is the formula for Calcium Oxide?

5. Ionic Compound Properties
Hard and brittle
Solid at room temperature
Very High Melting Points
Conduct Electricity if heated to liquid state
Conduct electricity if dissolved in water or some other solvent.

6. Relating Structure to Properties
Each ion is attracted to and bonded with all of its neighbors, so the ions have an interconnecting network of bonds holding the entire crystal together.
Makes it hard and difficult to melt.
Brittle because putting pressure along edges can cause the ions to shift place so that positive and negative charges are not aligned.

7. Writing Names for Ionic Compounds
Binary ionic compounds:
First part of the name is just the name of the element.
Second part of the name is a modified version of the name of the element.
Typically, you drop the standard ending and add –ide.
Example: NaF would be ___________________

8. Warm-up 3/4/11
Write the chemical formula for the following pairs of elements:
Strontium and Nitrogen
Sodium and Bromine
Beryllium and Fluorine
Hydrogen and Oxygen
Barium and Iodine
Name the compounds you created.

9. Polyatomic Ions
A small molecule with an overall positive or negative charge.

10. Writing Names for Ionic Compounds
Polyatomic Ions
Sometimes have to use an ion table
Otherwise, it is done the same was as it is for binary compounds.
MgCO3 = Magnesium Carbonate
(NH4)SO4 = Ammonium Sulfate

11. Common Ion Table

12. Naming with Transition Metals
Some positive ions are followed by Roman Numerals.
Describes the charge on that ion.
Most transition metals form multiple charges, as do metals in groups 14 and 15.
How would you write PbCl2?

13. Warm-up 3/7/11
Name the following compounds:
Ag2SO4
Au3N
Fe(NO2)2

14. Steps to Naming Binary Covalent Compounds
Prefix Definitions
Mono = 1
Di = 2
Tri = 3
Tetra = 4
Penta = 5
Hexa = 6
Hepta = 7
Octa = 8
Nona = 9
Deca = 10
1. Write down the name of the compound as if it were a simple binary ionic compound.
2. Add prefixes to each name which tell you how many of that atom are in the molecule.
NOTE: If there is only one atom of the first element in the molecule you can leave out the “mono” prefix.

15. Example:
SeBr6
1. Write the name of the compound as if it were a binary ionic compound.
Selenium Bromide
2. Add prefixes to indicate the number of atoms for each element. Do NOT add mono to the first element in the compound name.
-Selenium has 1 atom, Bromine has 6 atoms
-Prefix for 6 = hexa
Selenium hexabromide

16. Let’s Practice!
P2S3
H2O CO
N2O4