Catalyst – October 7(4), 20091. Write and name the compound

formed through Beryllium and Oxygen.

2. Write and name the compound formed between Potassium and Sulfur.

Today’s Agenda

Catalyst Practice Naming Ionic Intro to Covalent Compounds Covalent Bond Formation (more

LDS’s!) Project Work Time

Exit Question

What do you see? Copy the table into your notes and fill in the question marks with what you think is correct.

Formula for

Ionic Compound

Name for

Ionic Compound

NaCl Sodium chloride

CaCl2 Calcium chloride

KBr Potassium bromide

MgF2 ???

NaBr ???

Naming Ionic Compounds

1)Write name of first element (metal).

2)Second element ends in -ide.

3)Ignore subscripts!

Naming Ionic Compounds

Draw a mental line between the

ions.Na+ Cl-

Naming Ionic Compounds

Binary Ionic Compound – an ionic compound

composed of two elements

Naming Ionic Compounds

ZnO

Naming Ionic Compounds

ZnO

Zinc Oxide

Naming Ionic Compounds

CaCl2

Naming Ionic Compounds

CaCl2

Calcium Chloride

Naming Ionic Compounds

Al2O3

Naming Ionic Compounds

Al2O3

Aluminum Oxide

Naming Ionic Compounds

Ternary Ionic Compound – an ionic compound with more than

2 elements

Naming Ionic Compounds

Ionic Cheat Sheets!

Naming Ionic CompoundsDo not lose

this…you will need it the rest of your life (in my class).

Naming Ionic Compounds

The way you use it…

Naming Ionic Compounds1) Look up the ions

on the cheat sheet and write the words next to

them.

Naming Ionic CompoundsBaCO3

Naming Ionic CompoundsBaCO3

Normally the first element is the first

piece and the rest is the second piece.

Naming Ionic CompoundsBaCO3

Barium

Naming Ionic Compounds

If the first element is +2, where

should we find the second?(Remember, charges must

balance!)

Naming Ionic CompoundsBaCO3

Barium

Naming Ionic CompoundsBaCO3

Barium Carbonate

Naming Ionic CompoundsAlPO3

Naming Ionic CompoundsAlPO3

Aluminum

Naming Ionic CompoundsAlPO3

Aluminum Phosphite

Naming Ionic CompoundsH3PO4

Naming Ionic CompoundsH3PO4

Hydrogen

Naming Ionic CompoundsH3PO4

Think: H+, we have 3 which

means +3, where will PO4

be?

Naming Ionic CompoundsH3PO4

Hydrogen Phosphate

Naming Ionic CompoundsFeSO4

Naming Ionic CompoundsFeSO4

Notice Iron appears in +2

and +3…

Naming Ionic CompoundsFeSO4

Sulfate

Naming Ionic CompoundsFeSO4

Since Sulfate is -2, Fe must be

+2

Naming Ionic CompoundsFeSO4

Iron(II) Sulfate

Naming Ionic CompoundsFeSO4

Iron(II) Sulfate or

Ferrous Sulfate

Exit Question

What is the formula of the compound form between beryllium and phosphate. Then, name the compound.

What is the formula of the compound formed between sodium and oxygen. Then, name the compound

Today’s Objectives

SWBAT find some atom love! SWBAT state characteristics of

covalent compounds. SWBAT model covalent bond

formation.

Covalent Compounds in da House! Covalent compounds

are EVERYWHERE! Household cleaners

(Ammonia) Water! Salad dressing Political debate!

(think greenhouse gases)

Find the Characteristics of Covalent Compounds….

Let’s HUNT!

Characteristics of Covalent Compounds(Key Point #1)1. Electrons are shared2. Bonds between nonmetals and

non metals3. Usually gases at room

temperature (not crystals )4. Low melting points5. Poor conductors of electricity

What’s the difference between ionic and covalent compounds?It is important to understand the differences between ionic and covalent compounds

Let’s review ionic compound characteristics…

Characteristics of Ionic Compounds

1. Electrons are transferred2. Bonds between metals and

nonmetals3. Make crystals4. High melting points5. Good conductors of electricity

when dissolved

Group Race!

Each group will complete a Double Bubble Diagram…liiiiiike this (Double Bubble doc)

Rules:1. No talking or sharing of notes!2. First person fills in ONE bubble and passes

paper to next person – cannot skip people!3. If next person doesn’t know an answer,

he/she must stand up and do 10 jumping jacks before passing paper.

4. Next person fills in ONE bubble and passes paper to next person…etc!

How do covalent bonds form?Let’s look at Lewis Dot Structures again!

Key Point #2: Each atom in a compound satisfies the octet rule. This is shown in a Lewis Dot Structure.

Single Bonds

Single covalent bond: one pair of shared electrons (two electrons)

Atoms may be the same H2, F2, Cl2, Br2, I2, O2

Atoms may be different HF, HCl, HBr, HI

=

Formation of Single Covalent Bonds

ExamplesH2

F2

HCl (chlorine)

Formation of Single Covalent Bonds

Your Turn!Cl2

HBr

Tricks!

Central atom: in the center of a molecule, usually has lower electronegativity

Terminal atom: not in the center of a molecule

Hydrogen will NEVER be a central atom!

Formation of Multiple Single Bonds

ExamplesNH3

SeCl2

Formation of Multiple Single Bonds

Your Turn!NF3

CH4

CH3Cl

Practice Time – Finish for HW! Draw the Lewis Dot Structures for the

following covalent compounds:1. Br2

2. HI3. PH3

4. H2S

5. CCl46. PH3

7. SiH4

Exit Question

1. What are 3 characteristics of covalent compounds?

2. What is one difference between ionic and covalent compounds?

3. Draw the Lewis Dot Structure for Cl2.