Products and Reactants
What is a product?
The substance produced.
What is a physical change?
A change to a substance physical. The chemical is still the same.
What is a chemical bond?
An attraction between atoms, ions, or molecules that enables the formation of molecules
Yes
What does Δ mean?
Delta
What is a reactant?
The starting substance
Give an example of physical change.
- Water --> Ice --> Vapor
- Ripping paper
- Breaking a rock
What do chemical bonds do?
Chemical bonds hold molecules together and create temporary connections
Give an example of a chemical change.
- Air bubbles
- Oder
- Tempature
- Color
What does chem. rxn mean?
Chemical Reaction
What happens to the reactant to make the product?
Atoms rearrange and form new bonds.
Why is a physical change different from a chemical change?
A chemical change affects the substance, while a physical change is the same substance in a different form.
Why do they form Chemical bonds?
If atoms don’t have this arrangement, they’ll “want” to reach it by gaining, losing, or sharing electrons via bonds.
What do we change in a chemical to create a chemical change?
We are rearranging the molecules
What do we use delta (Δ) to represent?
Change
Yes.
What is percipitates?
When two of the same form (solid, liquid, gas) create a different form.
Ex: Liquid + Liquid = Solid
Why do scientists shorten words, like chem. rxn?
To use as little time as possible.
What is the product for 2HOv2?
Ov2 + 2Hv2
Is burning paper a chemical change?
Yes, because of the oder changes, the color change, etc.
What is a subscript?
Numbers that come after a symbol and below a symbol to show how many molecules there are.