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science study 123
science study stack
| Question | Answer |
|---|---|
| law of conservation of mass | a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system |
| Physical change | a usually reversible change in the physical properties of a substance, as size or shape: |
| Chemical change | Chemistry . a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: |
| Element | Chemistry . one of a class of substances that cannot be separated into simpler substances by chemical means |
| Chemical Formula | a representation of a substance using symbols for its constituent elements |
| Element ( Diatomic ) molecule and Compound molecule | the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. |
| Chemical equation | a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product |
| Chemical reaction | A process in which atoms of the same or different elements rearrange themselves to form a new substance. While they do so, they either absorb heat or give it off. |
| Reactants | any substance that undergoes a chemical change in a given reaction. |
| Products | a substance obtained from another substance through chemical change. |
| Coefficient | a number that is constant for a given substance, body, or process under certain specified conditions, serving as a measure of one of its properties: |
| Subscript | Also called subfix. any character, number, or symbol written next to and slightly below another. |
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