| A | B |
|---|
| compound | a substance made up of two or more different atoms bonded chamically |
| element | a substance that cannot be broken down into simpler substances by chemical or physical means |
| mixtures | a combination of two or more substances that are not chemically combined |
| heterogeneous | a type of mixture that looks different throughout |
| homogeneous | type of mixture that looks the same throughout |
| molecule | two or more atoms join together through chemical bonding |
| atom | smallest unit of an element, maintaining the properties of that element |
| proton | positively charged particle in the nucleus |
| neutron | neutral particle in the nucleus |
| electron | a negatively charged particle zipping around in the electron cloud |
| nucleus | center of an atom containing protons and neutrons |
| electron cloud | region around the nucleus (shells/orbitals) that contain the electrons |
