2. Atoms, Molecules and Compounds
Atom – An individual building block of matter. (Example: Au, C)
Molecule – More than one atom stuck (bonded) together. (Example: H2O, O2)
Compound – More than one TYPE OF ATOM stuck (bonded) together. (Example: CO2, H2O2)

3. Color
Element
representation
Symbol
Black
Carbon C
Blue
Nitrogen N
Yellow
Hydrogen H
Red
Oxygen O
Green
Chlorine Cl
Orange
Bromine B
Purple
Iodine I

4. What do the numbers mean?
2H2O2
Big Number:
The number
of molecules
Small Numbers:
The number
of atoms

5. Challenge Questions
Why do the carbon atoms have 4 holes and the hydrogen atoms have 1 hole?
Why are there springs in the kits?
Try to draw an oxygen atom in box #2 on your lab that shows how the electrons would be arranged.

6. 6 Red
2 Orange
2 Purple
4 Green
28 Yellow
2 Blue
10 Black

7. Propane Molecule

8. Molecules Break Up and Recombine
Burning Propane
Molecules Break Up and Recombine
C3H8
+ 5 O2
→ 3 CO2
+ 4 H2O
The Law of Conservation of Matter (Atoms are neither created nor destroyed, just rearranged.)

9. Glucose Molecules In this picture gray = hydrogen. In our kits
yellow = hydrogen

10. Caffeine Molecule (C8H10N4O2)
Grey = Yellow

11. “Picture of Atoms”

12. A bit of middle school humor:
The propane “puppy” finds an oxygen “hydrant”.