Chemical Reaction Notes
- Chemical Reaction: is the result of a chemical change
- Chemical Reaction: A chemical reaction occurs when atoms separate, come together, or rearrange to form new substances with new properties.
- A chemical reaction can also release heat and light; the formation of a solid also indicates a chemical reaction has taken place (solid is called a precipitate)
- A chemical reaction can also be seen in rust, tarnishing, and carbonated drinks
- Molecule: atoms that combine with other atoms to form larger units
- Compound: two elements chemically combine to form a new substance totally different from the elements that make up the compound; example: Salt= Na+CI= NaCI
- Water is a compound
- Sugar: C6H12O6 : 3 elements and 24 atoms
- 6CO2 + 6H20 ---> C6H12O6 + 6O2 photosynthesis and when the arrow is flipped around it becomes presperation