Physical vs Chemical change
What is a Physical Change
A change where no new substance is formed
What is subscripts?
The number of atoms of each atom type in the molecule.
Matter cannot be created or ______?
When substances transform into entirely new substances with different properties.
The number of molecules per substance.
In a reaction, the number of ______ stays the same.
Ice melting on a side walk, Physical or Chemical?
Physical Change
What is the state of matter?
Tells you the state (solid, gas, liquid, aqueous)
When counting atoms, the big number in front of a molecule is called the _______.
=Coefficent
Iron rusting on bike, Physical or Chemical?
Chemical Change
What is a Chemical Formula
A chemical formula shows which elements a substance contains and how many atoms of each are present.
What is the law of conservation of matter
=The law of conservation of matter states that matter cannot be created or destroyed in a chemical reaction.
Dissolving suger in water, Physical or Chemical?
Physical Change
What does it mean when a equation is balanced?
It means there are the same number of each type of atom on both sides of the equation.
In a chemical Reaction how do you know when it follows the law of conservation of matter?
A chemical reaction follows the law of conservation of matter if the number of atoms of each element is the same before and after the reaction.