1. Common Compounds

2. Element vs. Compound
An element is a substance that is composed of one or more of the same atoms.
A compound is a substance that is composed of two or more elements (different atoms) in a specific pattern.

3. Water
H2O
2 Hydrogen + 1 Oxygen O H H

4. Locations &/Or uses Most abundant compound on Earth!
Over 3/4ths of the planet’s surface is covered by this.
It exists as a solid, liquid & gas!

5. Sodium Chloride (Salt)
NaCl
1 Sodium + 1 Chlorine Na Cl

6. Locations &/Or uses Responsible for the saltiness of the seas.
Used on food & in some swimming pools.

7. Methane
CH4
1 Carbon + 4 Hydrogen H H C H H

8. Locations &/Or uses
This traps heat in our atmosphere, causing increases in temperature.
This is the main component in natural gas.
It can be used as a fuel.

9. Ammonia
NH3
1 Nitrogen + 3 Hydrogen H N H H

10. Locations &/Or uses This is a colorless, stinky gas.
It is used in fertilizers for growing plants, but it can also be in the atmospheres of planets.

11. Carbon Dioxide
CO2
1 Carbon + 2 Oxygen C O O

12. Locations &/Or uses
It enters the atmosphere when fossil fuels (coal, oil, gas) are burned.
We exhale this and plants take it in.