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Unit 4/5 Vocab words
| Term | Definition |
|---|---|
| Oxidation Number | The number of electrons that must be added to or removed from an atom in a combined state to concert the atom into the elemental form. |
| Oxidation-Reduction Reaction | Any chemical change in which one species is oxidized (loses electrons) and another species is reduced (gains electrons); also called redox reaction. . |
| Reactants | A substance or molecule that participates in a chemical reaction. |
| Products | A substance that forms in a chemical reaction. |
| Coefficients | A small whole number that appears as a factor in front of a formula in a chemical equation. |
| Law of Conservation of Mass | The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes. |
| Combustion Reaction | The oxidation reaction of an element or compound, in which energy as heat is released. |
| Decomposition Reaction | A reaction in which a single compound breaks down to form two or more simpler substances. |
| Synthesis Reaction | A reaction in which two or more substances combine to form a new compound. |
| Single displacement reaction | A reaction in which one element or radical takes the place of another element or radical in a compound. |
| Double displacement reaction | A reaction in which the ions of two compounds exchange places in an aqueous solution to form two new compounds. |
| Monatomic ions | An ion formed from a single atom. |
| Nomenclature | A naming system. |
| Oxyanions | A polyatomic ion that contains oxygen. |
| Formula Mass | The sum of the average atomic masses of all atoms represented in the formula of any molecule, formula unit, or ion. |
| Percent Composition | The percentage by mass of each element in a compound. |
| Empirical Formula | A chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio. |
| Chemical Equation | A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products. |
| Word Equation | An equation in which the reactants and products in a chemical reaction are represented by words. |
| Formula Equation | A representation of the reactants and products of a chemical reaction by their symbols or formulas. |
| Reversible Reaction | A chemical reaction in which the products re-form the original reactants. |
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