| A | B |
|---|
| matter | anything that has mass and takes up space |
| element | a substance that cannot be broken down into simpler substances |
| atom | the smallest particle that has the properties of an element |
| compound | a substances made of atoms of more than one element bound together |
| molecule | the smallest unit of a substance that exhibits all of the properties characteristic of that substance |
| chemical formula | the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance |
| mixture | a combination of more than one pure substance |
| proton | positivly charged particle located in the nucleus of an atom |
| electron | negatively charged particle located in the electron cloud |
| neutron | a particle of the nucleus without a charge |
| electron cloud | the area of the atom surrounding the nucleus where the electrons can be located |
