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Science vocab
| Question | Answer |
|---|---|
| Law of Conservative of Mass | the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction |
| Physical change | Although some extensive properties (like shape, phase, etc.) of the material change, the material itself is the same before and after the change. The change can be “undone". |
| Chemical change | The substances present at the beginning of the change are not present at the end; new substances are formed. The change cannot be “undone". |
| Element | Substance that cant be broken down into simpler substances. |
| Chemical formula | a representation of a substance using symbols for its constituent elements. |
| Element (Diatomic) Molecule | are molecules composed of two of the same element. |
| Compound Molecule | Compounds are groups of two or more elements that are bonded together. |
| Chemical Equation | A symbolic representation of what happens when chemicals come in contact with one another. |
| Chemical Reaction | A process in which one or more substances are chemically changed into one or more new substances (products). |
| Reactants | any substance that undergoes a chemical change. |
| Products | a product is a substance that is formed as the result of a chemical reaction. |
| Coefficient | The number in front of the variable. |
| Subscript | A subscript is the number that is written below the element that lets you know how many molecules of that element are present |
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