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Science Vocabulary
stuff
| Question | Answer |
|---|---|
| Law of Conservation of Mass | States that the mass of an isolated system (closed to all matter and energy) will remain constant over time. |
| Physical Change | Any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition. |
| Chemical Change | Occur when a substance combines with another to form a new substance. |
| Element | A pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus. |
| Chemical Formula | A way of expressing information about the atoms that constitute a particular chemical compound. |
| Element (Diatomic) Molecule | Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements. |
| Compound Molecule | A compound molecule is an electrically neutral group of two or more atoms held together by covalent chemical bonds. |
| Chemical Equation | A chemical equation is the symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side. |
| Chemical Reaction | A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. |
| Reactants (in a chemical equation) | A substance that is consumed in the course of a chemical reaction. |
| Products (in a chemical equation) | Product(s) are formed during chemical reactions as reagents are consumed. |
| Coefficient (in a chemical equation) | The coefficients next to the symbols and formula of entities are the absolute values of the stoichiometric numbers. |
| Subscript (in a chemical equation) | A subscript or superscript is a number, figure, symbol, or indicator that appears smaller than the normal line of type and is set slightly below or above it. |
| Ionic Compound | In chemistry, an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. |
| Covalent Compound | A molecule formed by covalent bonds, in which the atoms share one or more pairs of valence electrons |
| Metallic Compound | A metallic compound is a compound that contains one or more metal elements. |
| Synthesis | In general, the noun synthesis refers to a combination of two or more entities that together form something new; alternately, it refers to the creating of something by artificial means. |
| Decomposition | Decomposition is the process by which organic substances are broken down into simpler forms of matter. |
| Single Replacement | A single-displacement reaction, also called single-replacement reaction, is a type of oxidation-reduction chemical reaction when an element or ion moves out of one compound and into another. |
| Double Replacement | A double replacement reaction is a chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions. |
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n0402637
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