| Question |
Answer |
| binary compounds | A compound that is composed of two different elements. |
| chemical equations | An equation that represents the changes that take place in those compositions as the substances react. |
| chemical formula | A shorthand method of expressing the makeup of a compound (pure substance). |
| coefficients | A number placed before a formula to balance an equation. |
| combination reactions | Reactions that combine two or more substances into one more complex compound. |
| decomposition reactions | Reactions that decompose or take apart the formula units or molecules of a substance. |
| double-replacement reactions | In this reaction, two ionic compounds swap cations and anions with each other. |
| electrolysis | A decomposition reaction that decomposes the reactants by an electric current in solution. |
| endothermic reactions | A reaction that requires thermal energy. |
| exothermic reactions | A reaction that gives off thermal energy. |
| oxidation numbers | Symbols that indicate the number of electrons that an element gains or loses as it bonds. |
| polyatomic ions | A group of several atoms that act as a single charged particle. |
| precipitates | A solid formed during a reaction; insoluble in water. |
| products | A substance (on the right hand side of the equation) that is produced by a chemical change. |
| reactants | A substance (on the left-hand side of the equation) that undergoes a chemical change. |
| single-replacement reactions | In this reaction, one element in an existing compound is replaced by another element. |
| subscripts | A small number placed beside the symbol of an element in a formula to indicate the number of atoms of that element contained in the compound represented by that formula. |
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