Unit B | Topic 6 | Chemical Compounds

Question 1

Definition of:
Chemical compound

Answer 1

A group of 2 or more different elements bonded together

Question 2

True or false:
Chemical compounds have different properties than the elements it’s made of

Answer 2

True

Question 3

What are the three things a chemical formula tells us about a compound?

Answer 3

• Elements in the compound
• Total number of atoms in the compound
• State of the compound

Question 4

Definition of:
Ionic bonds

Answer 4

Bonds that are present when electrons travel between a metal and nonmetal

Question 5

Properties of:
Ionic bonds

Answer 5

• strong bonds
• Separate in solutions
• Always solid
• Particles conduct when dissolved in water

Question 6

Definition of:
Molecular / Covalent bonds

Answer 6

Bonds that are present when electrons are shared between two nonmetals

Question 7

Properties of:
Molecular / Covalent bonds

Answer 7

• Weak bonds
• Don’t form ions
• Don’t conduct electricity
• solid, liquid, or gas

Question 8

What is the process of naming molecular compounds?
(hint: has to do with prefixes!)

Answer 8

1. Write the name of the first element
2. Change the ending of the second element to “ide”
3. Use a prefix to indicate the # of each type of atom

Question 9

When would you give the first element a prefix in a molecular compound?

Answer 9

When there is more than one of the first element

Question 10

What are the prefixes for molecular compounds?

Answer 10

1 = mono
2 = di
3 = tri
4 = tetra
5 = penta
6 = hexa
7 = hepta
8 = octa
9 = nona
10 = deca

Question 11

True or false:
You use prefixes when naming a compound that has metal

Answer 11

False:
You only use prefixes for molecular compounds, which can’t have metal

Question 12

What is the process of naming ionic compounds?

Answer 12

1. List the metallic element first
2. List the nonmetallic element second
3. change the ending of the nonmetal to “ide”
4. use subscripts to indicate the ratio of ions

Question 13

Definition of:
Polyatomic ions

Answer 13

A single ion that contains more than one element

Question 14

What is the charge of most polyatomic ions?

Answer 14

Negative

Question 15

Definition of:
Multivalent ions

Answer 15

Elements that can form two different ions during a chemical reaction depending on what they react with

Question 16

How can the charge of a multivalent ion be represented?

Answer 16

Using roman numerals that directly represent the charge