Signs of a Chemical Reactions
What is the sign of the chemical reaction? A glowstick cracking.
color change or light formation
What is a reactant?
A substance that takes part in and undergoes the change.
The starting substance of a reaction.
What is a physical change?
A change in appearance.
Precipitate
What is a property?
Physical and chemical characteristics of a substance.
Gas bubbles
What happens in a chemical reaction?
Atoms break apart and rearrange to form new substances.
Give me an example of a chemical change.
Answers will vary
Product
The substance produced during a chemical reaction
Name a physical property of the whiteboard.
White, solid, shiny
A small white solid forms at the bottom of the test tube when mixing lead nitrate and copper sulfate.
precipitate
What is on the left side of the arrow in a chemical reaction?
reactants
What is a chemical change?
A change in the substance.
Properties
Physical and chemical characteristics of a substance
Give me 3 properties of water.
Clear, odorless, liquid
A firework.
light formation or temperature change
Products are on the right or left side of the arrow.
right side
Why is burning wood a chemical change?
It changes color, produces an odor, temperature change
Compound
When two or more DIFFERENT elements combine
List 3 properties of oxygen.
Clear, odorless, gas
Baking cookies.
color change, temperature change, odor
What do the subscripts tell us in chemical equations?
how many atoms of each element there are
Give me an example of a physical change.
Tearing cloth, cutting paper
Molecule
The simplest unit of a chemical compound created when two or more atoms join together
How do you find density?
m/v