Study your notes! Quiz Ch.8

• Write the formula and name the following:

1. Ca + Se 2. Sr + Br 3. Al + P • Write the formula from the name:4. Chromium(III)oxide5. Cesium iodide

Naming Ternary Ionic Compounds

Na + NO3 NaNO3

Sodium nitrate

How? (use the handout!)

Polyatomic Ions(many atom ions)

• Polyatomic ions are covalently bonded atoms with a collective charge.

• EX: .. H+ H N H + H+ H N H

H

NH4+ is the ammonium ion ( +1 charge)

Review the List of Polyatomic Review the List of Polyatomic IonsIons

Treat a Polyatomic ion as a Single ion; Treat a Polyatomic ion as a Single ion; don’t break it up !!don’t break it up !!

You know some of these ions by You know some of these ions by name.name.

Nitrates (NONitrates (NO33--))

Nitrites (NONitrites (NO22--))

Phosphates ( POPhosphates ( PO44-3-3))

Writing Formulas Writing Formulas w/Polyatomicsw/Polyatomics

Li + COLi + CO33-2-2 Li Li22COCO33

Mg + POMg + PO44-3-3 Mg Mg33(PO(PO44))22

NHNH44 + Cl + Cl NH NH44ClCl

NAMES!!NAMES!!

Lithium carbonateLithium carbonate

Magnesium phosphateMagnesium phosphate

Ammonium chlorideAmmonium chloride

The Rules for Ternaries(very easy!!) Write the correct formula Write the name of the Cation first Write the full name for the Anion second That’s it !!

Al + SO4-2

Al+3 + SO4-2

Al2(SO4)3 * use parens ( ) if you need more than 1 ion!

Aluminum sulfate

You have 5 min to review notes from last class. Write the formulas for :

1. Ca + N2. Al + SO3 -2

3. Mg + phosphate Write the names for the above.

Write the formula for:

1. Magnesium carbonate 2. Nickel(II)sulfate

Naming Covalent Compounds( really easy)

CO2 CO P2O4 SO3

carbon carbon diphosphorous sulfur

dioxide monoxide tetraoxide trioxide

Covalent Compounds consist of two non-metals!! There are no charges to balance because no

electrons are lost or gained. So, how do you get the ratios? Know the prefixes

Prefixes: only for Covalent Cmpds.Non-metal, Non-metal combinations Mono 1 Di 2 Tri 3 Tetra 4 Penta 5

Hexa 6 Hepta 7 Octa 8 Nona 9 Deca 10

Try These !!

Name the following: PO4

NO2

NO3

N2O3

P2O5

SiO2

Write the formula: Sulfur trioxide Boron dioxide Dinitrogen

pentoxide Carbon monoxide Carbon

tetrachloride

Handout !!