| A | B |
|---|
| Compound | Substance formed when the atoms of two or more elements join chemically |
| States of matter | Basic forms in which matter exists, including solid, liquid, and gas |
| Element | Substance that cannot be changed or separated into other kinds of substances |
| Nucleus | Atom's center, which is made of protons and neutrons |
| Chemical property | Characteristic that describes how a substance changes into a different substance |
| Mixture | Two or more elements or compounds mixed together, but not joined chemically |
| Property | Characteristic that describes matter |
| Physical property | Characteristic of a substance or an object that can be observed without changing the substance into a different substance |
| Matter | Anything that has mass and takes up space |
| Atom | Smallest particle of an element that has the characteristics of that element |
