| A | B |
|---|
| compounds | made from the atoms of 2 or more elements |
| transuranium element | any element with an atomic number greater than that of uranium |
| scientific law | a rule or principle that describes what happens in nature |
| electron | a particle that moves around the nucleus of an atom |
| plasma | the most common state of matter in the universe |
| solid | at room temperature what most metals are |
| shiny | the appearance of solid metals can be described as this |
| hypothesis | a proposed explanation |
| quarks | particles of matter that make up protons and neutrons |
| endothermic | if heat must be added to a chemical reaction for the reaction to take place |
| inclined plane | a slanted surface used to raise an object |
| precipitate | an insoluble compound that forms during a chemical reaction |
| alkali | family of elements that contains the most reactive metals |
| semiconductors | substances that conduct an electric current only under certain circumstances |
| centripetal force | an object moves in a circular path, it accelerates toward the center of the circle as a result of this |
| plasma | a gas-like mixture with no definite volume or shape that is made up of positively and negatively charged particles |
| momentum | in the equation p=m x v, the p represents |
| protons & neutrons | found in the nucleus of an atom |
| 32 | maximum number of electrons in the 4th energy level |
| covalent | chemical bond that occurs when atoms share electrons |
