Terms : Hide Images
| 8016421160 | atom | smallest unit of matter than still retains the properties of an element. |  | 0 |
| 8016427807 | molecule | a group of atoms held together by covalent bonds |  | 1 |
| 8016434410 | compound | a pure substance made of two or more elements chemically combined. |  | 2 |
| 8016438763 | element | pure substance made of one kind of atom | 3 | |
| 8016457883 | atomic number | The amount of protons an atom has. |  | 4 |
| 8016460180 | atomic mass | the sum of the amount of protons and neutrons present in an atom. |  | 5 |
| 8016476735 | valence orbit | outer most orbit in an atom | 6 | |
| 8016479856 | octet rule | the valence orbit must have 8 electrons | 7 | |
| 8016482458 | Ion | an atom that has gained for lost valence electrons . | 8 | |
| 8016483964 | Bond | Energy that holds atoms together by movement of electrons. | 9 | |
| 8016488714 | Polarity | regions in the molecule that electrically charged | 10 | |
| 8016542257 | polar molecule | molecule that has opposite ends with opposite electric charges. |  | 11 |
| 8016547058 | covalent bonds | chemical bonds that results from the sharing of valence electrons | 12 | |
| 8016565222 | polar covalent bond | a type of bond that forms when electrons are not shared equally | 13 | |
| 8016568036 | non-polar covalent bond | a type of bond that forms when electrons are shared equally or near equally. | 14 | |
| 8016575718 | chemical bond | the force that holds two atoms together | 15 | |
| 8016592910 | ionic bond | bonding between 2 ions | 16 | |
| 8016608791 | hydrogen bond | hydrogen is attracted to a negatively charged atom on a neighboring molecule | 17 | |
| 8016613583 | cohesion | the attraction of water molecules to each other | 18 | |
| 8016615368 | surface tension | cohesive forces are strong enough to make water act as if there is a thin skin on its surface | 19 | |
| 8016618063 | adhesion | attraction between particles of different substances | 20 |
