Terms : Hide Images
| 16315582494 | atomic number | The number of protons in an atom |  | 0 |
| 16315582495 | atomic mass | The total weight of an atom (or how heavy it is) |  | 1 |
| 16315582496 | atom | A small particle that makes up most types of matter and is made up of smaller parts called protons, neutrons, and elections. |  | 2 |
| 16315582497 | nucleus | The center part of an atom that has a positive charge. It contains protons and neutrons. |  | 3 |
| 16315582498 | neutron | A particle in the nucleus of an atom that has no charge (uncharged). |  | 4 |
| 16315582499 | proton | A particle in the nucleus of an atom that has a positive charge |  | 5 |
| 16315582500 | electron | A particle with a negative charge that is found in a cloud-like formation surrounding an atom's nucleus. | | 6 |
| 16315582501 | Periodic Table of Elements | A chart of the elements showing the repeating pattern of their properties |  | 7 |
| 16315582502 | matter | Anything that has mass and occupies space. It is a solid, liquid, or gas. |  | 8 |
| 16315582503 | element | A ____________ is a substance made from only one kind of atom |  | 9 |
| 16315582504 | mass number | = protons + neutrons |  | 10 |
| 16315582506 | compound | When two or more elements combine to create a new pure substance. Ex. NaCl = salt |  | 11 |
| 16315582507 | mixture | When two or more substances combine but don't create a new substance. Ex. chocolate milk |  | 12 |
