•Date: 11-24-14•Day Plan: 1) Notes on I - Ionic Bonds

2) Practice 3) Homework – List the first 30

elements and there symbols in your notebook •Opener:

1) Define Compound

2) What are you plans for Thanksgiving?

Review•Compound: two or more elements

chemically combined in a fixed ratio

I - Ionic Bonds and Ionic Compounds

A) Properties of Ionic Compounds

•Solids at room temperature•Atoms arranged in a 3D pattern•High melting points•Conduct an electric current when melted

or dissolved in water

FluoriteCaF2Pyrite

FeS2

B. Cations•Atoms can form ions by losing electrons in

order to achieve an octet.•Metals that tend to lose one or more

electrons to form positive ions• generally named by using the name of the parent

atom.

• Nonmetals tend to gain one or more electrons to form negative ions

C. Anions

• named by using the root of the atom name followed by the suffix –ide.

D) Formation of Ionic Compounds

•Composed of first Cations (metal) then Anion (non-metal)▫Example:Potassium Chloride

Magnesium Sulfide Sodium Chloride – Draw the Lewis dot structure

Na Cl

So What’s Happening?

Na Cl+1

-1

Cation

Anion

Opposites Attract

D) Formation Continued•Electrically neutral -Metal gives their

electrons to the non-metal creating an ionic bond •Want 8 valence/full outer shell

•Example: Sodium Chloride▫Sodium: 1s22s2sp63s1 Na

▫Chlorine: 1s22s22p63s23p5 Cl

Practice: Hydrogen and Bromine

Practice: Potassium and Iodine

Practice: Magnesium and Oxygen

Practice: Hydrogen and Oxygen (you may need more than one of each type of atom)

Practice: Hydrogen and Carbon (you may need more than one of each type of atom)

Practice: Potassium and Nitrogen (you may need more than one of each type of atom)

Practice: Calcium and Sulfur (you may need more than one of each type of atom)

One of the following pairs will form an ionic bond, one won’t. Draw out the one that will form the bond and describe why the other pair won’t bond.Lithium and Magnesium Zinc and Oxygen

Chemical Formula• A written representation of a substance

using symbols for its elements• Subscripts

• Show how many of each TYPE of atom are in the compound

• Example: Water H2O

Naming and Writing Formulas For Ionic Compounds

Binary Compound

•Composed of two elements

•Can be ionic or molecular

Chemical Formula forIonic Compounds•Formula Units

▫Lowest whole-number ratio of the ions in a compound

•Example:▫Sodium Chloride

Cinnabar

HgS

NaCl

Magnesium Chloride

Calcium Nitride

Naming Ionic Compounds

•Cation FIRST▫Keeps name of element

•Anion SECOND▫Add an –ide ending

•Number of each element DOES NOT MATTER

•Example: NaCl MgCl2Sodium Chloride

Magnesium Chloride

Hand out Common Ion List

What’s Going On?!Copper (i) Oxide Copper (ii) Oxide

Is it Cu+1 or Cu+2?CuS Cu2S

Grab a whiteboard and let’s practice!

Chemical Formula Practice:

•What is the formula for Aluminum Bromide?

Practice:

•Predict the formula if Oxygen and Potassium form an ionic bond.

Practice:

•Predict the formula if Copper(ii) and Nitrogen form and ionic bond.

One of the following pairs will form an ionic bond, one won’t. Draw out the one that will form the bond and describe why the other pair won’t bond.Argon and Oxygen Barium and Carbon

Practice: Write the correct formula for the compounds formed from each pair of ions

Potassium and SulfurCalcium and Oxygen

Practice: Write the formulas for each compound

Barium Chloride Lithium Oxide

Practice: Which pairs of elements are likely to form ionic compounds?•A. Cl and Br

•B. Li and Cl

•C. K and He

•D. I and Na