|What is an atom?
||The building block of matter
|What happens when atoms combine?
||They form different types of matter
|What is an element?
||A substance made of only one type of atom
|What is the relationship among atoms, elements, and molecules?
||They are all made up of atoms
|What is a compound?
||Two or more elements that are chemically joined
|Matter with a composition that is always the same
|A mixture in which the substances are not evenly mixed
|Substance made of only one kind of atom