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science vocab
vocab for science
| 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 physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. |
| Chemical Change | a process in which one or more substances are changed into one or more different substances. |
| Element | A chemical element is a substance that cannot be broken down by chemical means |
| Chemical Formula | A representation of a substance using symbols for its constituent elements |
| Element (Diatomic) Molecule | molecules composed only of two atoms, of either the same or different chemical elements |
| Compound Molecule | a compound regarded as a union of molecules retaining their identities |
| 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 one or more substances (reactants) are chemically changed into one or more new substances (products) |
| Reactants (in a Chemical Equation) | Any substance that undergoes a chemical change in a givin reaction |
| Products (in a Chemical Equation) | a substance that is formed as the result of a chemical reaction |
| Coefficient (in a Chemical Equation) | The number immediately preceding the compound |
| Subscript (in a Chemical Equation) | numbers used to tell you how many atoms of an element are present in the equation |
| Iconic Compound | A chemical compound in which ions are held together in a lattice structure by ionic bonds |
| Covalent Compound | A form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms |
| Metallic Compound | a compound that contains one or more metal elements |
| Synthesis | The production of chemical compounds by reaction from similar materials |
| Decomposition | The state or process of rotting |
| Single Replacement | A chemical reaction in which an element replaces one element in a compound |
| Double Replacement | A chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions |
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