| A | B |
|---|
| Atom | A small particle that is the building block of matter. |
| Compound | A substance containing atoms of two or more different elements chemically bonded together. |
| Element | A substance that consists of only one type of atom. |
| Heterogeneous Mixture | A mixture in which the substances are not evenly mixed. |
| Homogeneous Mixture | A mixture in which the substances are evenly mixed but not bonded together. Sometimes called a solution. |
| Matter | Anything that has mass and takes up space. |
| Mixture | Matter that can vary in composition or ratio from one sample to the next. |
| Molecule | A substance containing at least two atoms or more chemically bonded by a covalent bond. |
| Pure Substance | Matter with a composition that is always the same. Classified as an element or compound. |
| Electron | A subatomic particle, which circles the nucleus, that has a negative charge. |
| Electron Cloud | The region surrounding an atom's nucleus where one or more electrons are most likely to be found. |
| Neutron | A subatomic particle, found in the center of an atom, which holds no charge. Neutral. |
| Nucleus | The center of an atom which contains the protons and neutrons that account for the majority of the mass. |
| Proton | The positively charge particle in the center of an atom. |
| Sub-atomic particles | protons, neutrons, electrons |
| atomic kinetic theory of matter | the theory of the movement and energy of matter (atoms) as it changes from a solid to a liquid to a gas and vise versa |
| Solution | A homogeneous mixture of two or more substances |
| Saturated | Containing the highest amount of a substance before the solute begins to fall out of the solution |
| Solute | A substance that is dissolved in a solution. |
| Solvent | A liquid substance capable of dissolving other substances |
