Substances are made up of how many particle(s)?
1
What groups are matter defined in?
substances or mixtures
If the substances particles are atoms, what do you have?
an element
What is the smallest piece of an element?
a single atom
Elements cannot be broken down chemically, so how do you break them?
Nuclear reactions break apart atoms
What is the smallest piece of a compound?
molecule
Can compounds be broken down chemically?
yes