Chemistry: Naming Ionic Compounds with Polyatomic Ions

What is the formula for ammonium sulfate?

(NH4)2SO4

What is ammonium phosphate's formula?

(NH4)3PO4

Cobalt oxide is a compound with the formula Co2O3. How many atoms of oxygen are in the formula for cobalt oxide?

3

iron sulfate, Fe2(SO4)3, is a yellow compound that has several commercial uses. How many sulfur atoms are represented in the formula Fe2(SO4)3?

3

the chemical formula for ammonium sulfate is (NH4)2SO4. How many atoms of hydrogen are in the formula for ammonium sulfate?

8

What is the name of Al(NO3)3?

Aluminum Nitrate

Name this compound: Ca2CO3

Calcium carbonate

Which of these is NOT a polyatomic ion?

Cl- in MgCl2

If copper (II) and phosphate bond together, the resulting chemical formula would be:

Cu3(PO4)2

What is the formula for iron(II) carbonate?

FeCO3

What is the name of the compound Ga2Se3?

Gallium (III) Selenide

What is the name of the following compound: Pb3(PO4)4

Lead IV Phosphate

What ionic compound is form between lithium and carbonate?

Li2CO3

What is the name of the compound Li3N?

Lithium Nitride

The proper formula for magnesium hydroxide:

Mg(OH)2

What is the formula for sodium nitrate?

NaNO3

What is the name of K3PO4?

Potassium phosphate

What do the roman numerals after some ions mean? Example: Fe(II)

They tell the charge for a element that forms ions with several different charges.

Ionic compounds are written with

cation (+ ion) first then anion (- ion)

Name the following ionic compound: Cr(NO2)3

chromium III nitrite

What is the name of the compound KClO3?

potassium chlorate

When adding a subscript to a polyatomic ion, you should...

put brackets () around the polyatomic ion before adding a subscript

Why are they called polyatomic ions?

they are groups (many) atoms that are bonded together and act together as an ion.