Do Now:

• Creative Assignment– You are a CATION– You are writing to an ANION

• Write a short Love Note about the topic: “Let’s bond together”Email to ddavis@scischina.orgYou have 5 minutes!!!!!

HAVE YOUR HW OUT ON YOUR DESK!

Trade Papers and Check

Check Answers

Steps to NAMING ionic compound:1. Name the cation2. Name the anion and change the ending to “ide”

- Group 17: ine ide- Oxide- Sulfide- Selenide- Phosphide- Silicide- nitride- hydride

3. Add (roman numeral) if the cation is a transition metal

1. Calcium and Bromine 2. MgS

Naming Ionic Compounds

Examples:

Steps:1. Name the cation2. Name the anion and change the

ending to “ide”- Group 17: ine ide- Oxide- Sulfide- Selenide- Phosphide

3. Add (roman numeral) if transition metal

Try #1-4 on Ionic Formulas HW

1. FeO 2. CrBr3

Naming Ionic Compoundsw/ Transitional Metals

Examples:

Steps:1. Name the cation2. Name the anion and change the

ending to “ide”- Group 17: ine ide- Oxide- Sulfide- Selenide- Phosphide

3. Add (roman numeral) if transition metal

**Work Backwards**

Name the following in your notebook:

1. Pb3N2 2. CdBr2 3. NiI3

Then TRY #12-14 from formula HW

Steps to NAME an ionic compound with Polyatomic Ions:

1. Name cation (or ammonium only “+” p.i.)2. Name polyatomic ion

*** DO NOT CHANGE ANYTHING***

Example: Mg(NO3)2

Molecular / Covalent Compounds

• A compound that is composed of 2 or more non-metals

• How to recognize an molecular/covalent compound …

• Anion and anion• Nonmetal and nonmetal• - and -

Steps to NAMING a covalent compound :

1. Name the first element in formula2. Name second element in the formula and change

endings to “ide”3. Add prefixes before each element name (according

to the subscripts)4. EXCEPTION never use mono for the 1st element

Prefixes to MEMORIZENumber Prefix

1

2

3

4

5

6

7

8

9

10

1. CO2 2.N3F8

Naming Covalent CompoundsExamples:

Steps:1. Name first element in

formula2. Name second element and

change endings to “ide”3. Add prefixes (according to

how many there are)4. EXCEPTION never use

mono for the 1st element

Try #9-11on Naming Covalent Compounds Worksheet

Steps to Write the Formula for a covalent compound :

1. Write the symbol for the first element in the compound. 2. Write the formula for the second element in the formula.3. Add the prefixes as subscripts for each element.

• NO REDUCING• NO CHARGES

Ex 1: Carbon Monoxide Ex 2: Diphosphorus tetrachloride

HW