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science vocabulary
| Question | Answer |
|---|---|
| law of conservation of mass | The law implies that mass can neither be created nor destroyed.states that the mass of an isolated system (closed to all matter and energy) will remain constant over time. |
| physical change | Physical changes are changes affecting the form of a chemical substance |
| chemical change | Chemical changes occur when a substance combines with another to form a new substance |
| element | one of a class of substances that cannot be separated into simpler substances by chemical means. |
| chemical formula | a way of expressing information about the atoms that constitute a particular chemical compound. |
| element molecule | the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. |
| compound molecule | a compound made of 2 or more nonmetal elements |
| 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 (reactants) are chemically changed into one or more new substances |
| reactants | A substance participating in a chemical reaction, especially a directly reacting substance present at the initiation of the reaction. |
| products | A substance resulting from a chemical reaction. |
| coefficent | numerical measure of a physical or chemical property that is constant for a system under specified conditions |
| subscript | It is the number of atoms in the preceding element. |
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l0407285
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