AIM: What is a compound

What is a compound?

AIM: What is a compound

Identify exactly how atoms combine together to form compounds

AIM: What is a compound

Compound Compound

Chemical ChangeChemical Change

Physical ChangePhysical Change

Compound Compound

Chemical ChangeChemical Change

Physical ChangePhysical Change

AIM: What is a compound

Demonstration

1. Mr. Z will heat some sugar in a test tube

2. Sugar is C6H1206

3. What do you see happens4. First the sugar turns into a liquid5. And then just black.6. The black is solid carbon “C’7. The O and H were released as a gas

AIM: What is a compound

Chemical or physical Change ?

• Not sure

• Try putting the black residue on your breakfast cereal !

AIM: What is a compound

Compund

• Is a new substance produced when two or more elements chemically combine

• The new compound will have physical and chemical properties that will be different from the original elements

AIM: What is a compound

Example

• Pure Chlorine will kill you (Cl)• Pure Chlorine is a gas at room

temperature• Who know what Chlorine is.• Sodium (Na) also by itself is harmful• Chemically combine the two and

what do you get ?

AIM: What is a compound

Example

• Sodium (Na) also by itself is harmful

• At room temperature, sodium will explode into a fire

• Chemically combine Chlorine and Sodium and what do you get

AIM: What is a compound

AIM: What is a compound

AIM: What is a compoundUnlike Chlorine, salt

wont kill you.

Unlike sodium, it will not burst into flames

Salt has its own unique properties

Salt is a new compound

AIM: What is a compound

Element #1

Element #2

Element #2

New Compound

New Chemical & Physical Properties

AIM: What is a compound

Last Example

Chemical change was two or more elements forming a new compound

AIM: What is a compound

Element #1

Element #2

Element #2

Compound

Chemical & Physical Properties

AIM: What is a compound

Last Example

Chemical change was separating CHEMICALLY an existing compound into its original SEPARATE elements

AIM: What is a compound

Question

Can two compounds combine chemically to produce a NEW compound

YES