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Unti 5
Balancing chem equat
Term | Definition |
---|---|
Oxidation Number | Number of an atom is zero in a neutral substance that contains atoms of only one element |
Oxidation-Reduction Reaction | Any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron |
Reactants | A substance that takes part in and undergoes change during a reaction |
Products | A substance that is present at the end of a chemical reaction |
Coefficients | A number placed in front of a chemical symbol |
Law of Conservation of Mass | Mass is neither created nor destroyed in chemical reactions |
Combustion Reaction | A reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat |
Decomposition reaction | Processes in which chemical species break up into simpler parts |
synthesis reaction | Reactions that occur when two different atoms or molecules interact to form a different molecule or compound |
single displacement reaction | A reaction in which one element is substituted for another element in a compound |
double displacement reaction | Two ionic compounds that are exchanging anions or cations. |
Monatomic ions | An ion formed from a single atom |
nomenclature | the devising or choosing of names for things, especially in a science or other discipline. |
oxyanions | an ion with the generic formula A. xO z− y |
formula mass | the sum of the atomic weights of the atoms in the empirical formula of the compound |
percent composition | tells you by mass what percent of each element is present in a compound |
empirical formula | the simplest whole number ratio of atoms present in a compound |
chemical equation | shows the starting compounds, the reactants on the left and the final compounds, the products on the right, separated by an arrow |
word equation | represents a chemical reaction using the names of the substances involved |
formula equation | represents the reactants and products of a chemical reaction by their symbols or formulas |
reversible reaction | a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously |