Molecules & Compounds

A______is fromed when two or more atoms join together.

Finish the sentence.

A compound is a molecule that contains_____

• 1 or more of the same element.

• at least 2 different elements.

All compounds are molecules.

• True

• False

Oxygen gas is NOT a compound because...

• it has more than 1 element

• it is a molecule

• it only consists of 1 element

• its red

Examples of compounds.

(Select all that apply)

• 
• 
• 
• 

Physical and chemical change are the two basic types of properties that can help characterize substances.

• True

• False

Physical changes of a molecule include which of the following?

(Select all that apply)

• color

• odor

• density

• hardness

Select the physical change.

• 
• 
• 
• 

What is an example of a chemical change?

This is an example of what kind of change?

• explosive change

• chemical change

• density change

• physical change