Chemical Reactions - Pre-AP Flashcards
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| 15477660298 | precipitate | Solid substance produced from 2 liquids during a chemical reaction. Sign of a chemical reaction. |  | 0 |
| 15477660299 | bubbles | Gas given off during a chemical reaction. May or may not have an odor. Sign of a chemical reaction. |  | 1 |
| 15477660300 | signs of a chemical reaction | change in temperature, formation of bubbles (gas), precipitate forms, color change, change in smell, difficult to reverse |  | 2 |
| 15477660301 | subscript | Number written after and BELOW an element in a chemical formula telling you how many of the preceding element are needed for that compound or molecule. |  | 3 |
| 15477660303 | chemical change | Chemical reaction; when substances interact with each other and new substances are formed. |  | 4 |
| 15477660304 | physical change | When a substance changes its phase (changes to a solid, liquid , gas, or plasma) or is modified (size, shape, etc) but remains the same substance. |  | 5 |
| 15477660306 | molecule | A chemical combination of 2 or more atoms bonded together. |  | 6 |
| 15477660305 | compound | Any amount of a chemical combination of 2 or more different elements. |  | 7 |
| 15477660320 | chemical reaction | the process by which one or more substances change to produce one or more different substances |  | 8 |
| 15477660321 | chemical equation | a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products |  | 9 |
| 15477660322 | reactants | things that react together (on the left side of the equation) |  | 10 |
| 15477660323 | products | things that are produced (on the right side of the equation) | | 11 |
| 15477660310 | coefficient | numbers written in front of the element or compound to show how many molecules are present | 12 | |
| 15477660311 | conservation of mass | atoms are neither created or destroyed but only rearranged |  | 13 |