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3.3 Modeling chemica
Modeling chemical reactions 8th grade
| Question | Answer |
|---|---|
| Law of conservation of mass | matter is neither created or destroyed |
| open system | where matter can enter and escape |
| closed system | allows scientists to manipulate the controls and variables in the experiment |
| decomposition | compounds break down into simpler products, starts with one molecule and breaks into elements and compounds |
| chemical equation | shows the atoms and molecules involved in the reaction and what the products are from the reaction |
| Reactant | substances that are involved in the reaction that is present at the start of the reaction |
| product | substances that are produced at the end of the chemical reaction |
| yield | reacts to form is the arrow in the chemical equation |
| coefficients | numbers In front of atoms or molecules, to show how many particles of the reactants are needed |
| Synthesis reaction | two or more elements or compounds combine to make a more complex substance also known as combination reaction |