Warm Up

Ionization Energy Graph Questions…

(10 minutes to answer the questions…

10 minutes to discuss).

Bonding POGIL

30 minutes

My Name is Bond…

Chemical Bond

Chemical Bonding

Chapter 6

Chemical Bond

• Why do atoms bond??

• To become more stable.

Visual Concepts – to lower potential energy.

Types of Bonding

• Ionic– Transfer of electrons from one atom to another– Cations and anions attracting each other by opposite

charges (electrostatic bond)– Metal bonds with nonmetal

Visual Concepts

Covalent

Sharing of electrons between the atoms

Nonmetal bonds with nonmetal

Visual Concepts

What is the general rule?

Another “Trend”Electronegativity: a measure of the ability of an atom in a chemical bond to attract electrons from another atom in that bond.

Draw the Bohr Models for Li, F and Cl

Can you identify the trend??

Another “Trend”Electronegativity: a measure of the ability of an atom in a chemical bond to attract electrons from another atom in that bond.

Trend in Electronegativity

Determining bond type using electronegativiy differences…

• If the difference is < 1.7 a covalent bond forms.

• If the difference is > 1.7 an ionic bond forms.

Ex. Cl – Ca

Ex. Cl – Br

Let’s look at some ionic compounds…

Draw the molecular orbital diagrams for sodium and fluorine.

How would the electrons transfer?

Spend about 15 minutes working on the homework…

Finish the POGIL

Type of Bond WS

Bond Type Using Electronegativity

Ionic Bonding (on the back)

Warm Up

a. Draw the molecular orbital diagrams for Magnesium and Fluorine.

b. How will the electrons move?

c. How many Fluorine are needed to use all magnesium’s valence electrons?

Lewis Structures…

Represents the valence electrons on the atoms with dots… top, side, bottom, side

Visual Concepts

Lewis Structures

Mg F Al

The Octet Rule…

A Really Long Song!

In your own words… write the rule!

Show how the electrons would be transferred between.

Calcium Sulfur

Are the atoms more or less stable?

How has the energy changed?

This is what you are doing on the HW

Criss-Cross Method

We can determine the formula for a neutral ionic compound by looking at the charge of each atom.

Naming Ionic Compounds

Name the metal first….

Name the nonmetal…..

change the end to “ide”

NaCl

Sodium Chloride

Determine the neutral formulas and names for the following formula units.

F P S I

Be

K

Ba

Cs

Vocabulary Terms

Formula Unit- one molec..(oh! We can’t say that!) 1 unit of an ionic compound.

Electrostatic force - the force that occurs when a + charge is attracted to a - charge (causes the bonds!)

Salt- another name for ionic compounds

Characteristics of Ionic Compounds

• Crystal lattice is made of formula units, which repeat in a geometric pattern

• Creates a stable structure

Visual Concepts

Characteristics of Ionic Compounds

High melting and boiling points.

Hard and brittle

Many ionize in water- become good conductors.

Warm Up-11/16

a. Draw the Lewis Structures for Beryllium and Bromine.

b. Show how the electrons behave.

c. Write a neutral formula and name

d. Calculate the molar mass.

Ionic Bonding with Polyatomic Ions

Polyatomic Ions are covalently bonded groups of atoms that have a charge…..

Formula Units with Polyatomic Ions…what is the charge for each?

NO3 SO3 CN 02

CaKBa

Name the metal… name the polyatomic ion

Ionic Cut and Paste Activity

Color fast!!

Anything you don’t finish today will

need to be finished over the weekend!

Ionic Bonding with Transition Metals….

How would we name the following ionic compounds

NiCl

NiCl2

Transition metals can have more than one charge… her is where it gets a little tricky!

Ionic Bonding with Transition Metals….

Determine the neutral compound…

Fe 3+ and Cl1-

The charge of the METAL is indicated using a roman numeral after the name.

1+ (I)

2+ (II)

3+ (III)

4+ (IV)

5+ (V)

Warm Up: Name the following compounds…

CrO

Cr2O3

FeCl2FeCl3NiS

CoCl3

Now try going from name to formula!

Exceptions

All d block elements get a roman numeral

EXCEPT Zn2+, Cd2+, Ag1+

Metals in the p block- No roman numerals

EXCEPT Sn and Pb.

Work on the Naming WS

Do # 1-10

Do 10 a day till you are done…

Then try to go from the name to the formula…

Ionic Equations

How is the formula unit going to dissociate in water?

Barium chloride

Calcium phosphate

Cobalt(II)nitrate