What is a chemical change?
- A chemical change or chemical reaction has occurred whenever a new substance has formed.
- In a chemical reaction the substances you start with are called the reactants.
- The substances youb end up with are called it's products.
- You can write a chemical reaction as a chemical equation.
- The four basic types of chemical reactions are..
- Combination reactions
- Breaking-down reactions
- Precipitation reactions
- Combustion reactions