Chapter 6 - Ionic/Molecular Compounds

Question 1

Give the list of Polyatomic Compounds.

Answer 1

carbonate CO 2-  3
bicarbonate HCO -  3
sulphite SO 2-  4
sulphate SO 2-  3
nitrate NO 1  3
hydroxide HO -  0
chlorate ClO -  3
phosphate PO 3-  4
ammonium NH 4+ 1

check for correct answers

Question 2

Another word for valences.

Answer 2

Oxidation numbers.

Question 3

Metal + nonmetal = ending of ___
Metal + nonmetal + oxygen = “ ___
Nonmetal + nonmetal = “ ___

Answer 3

Metal + nonmetal = -ide
Metal + nonmetal + oxygen = -ate
Nonmetal + nonmetal = -ide + prefix

Question 4

What properties do most ionic compounds have?

Answer 4

• high melting points
• form crystals
• dissolve in water to form solutions that conduct electricity

Question 5

What causes the ions to group together in a crystal arrangement?

Answer 5

Ionic bonds.

Question 6

What properties do most molecular compounds share?

Answer 6

• can be solids, liquids, or gases at room temperature
• usually good insulators but poor conductors of electricity
• have relatively low boiling points

Question 7

Prefixes for molecular compounds? (1-5)

Answer 7

1 - mono
2 - di
3 - tri
4 - tetra
5 - penta

Question 8

What is the stock name for elements?

Answer 8

FeN -> iron (III) nitride

Question 9

How do you write the name of non-metal ions?

Answer 9

Take the element name and change the ending so that it includes the suffix
“-ide”.

For example, oxygen = O2-
(2- is upper right)