| A | B |
|---|
| proton | positively charged particle |
| mass number | protons + neutrons |
| electrons | negatively charged particles |
| physical property | Examples include color & odor |
| physical change | When this occurs, the material remains the same, even though its form appears to have changed. |
| chemical property | Examples include permanent color change & rust formation |
| chemical change | A permanent change; the original substance changes into a new substance |
| luster | Shine |
| ductile | The ability of a material to be drawn into thin wires |
| metals | Includes silver and gold, can conduct electricity, & are malleable. |
| nonmetals | Includes C and O, do not conduct electricity, & are brittle. |
| metalloids | Periodic table category includes properties ot both metals and nonmetals; it is the "in-between" category. |
| conductor | A material that allows electricity to flow through it |
| nonconductor | A material that does not allow electricity to flow through it |
| atomic number | The number of protons that each element has is called its _____. |
| nucleus | The center of an atom that contains protons & neutrons |
| mass number | The total number of protons & neutrons in the nucleus of an atom |
| isotopes | Atoms with the same number of protons but different numbers of neutrons, such as C12 and C13 |
| periods | The horizontal rows of the periodic table |
| groups | The vertical columns of the periodic table; also known as families. |
| families | The vertical columns of the periodic table; also known as groups. |
