Question | Answer |
Minimum amount of energy needed to start a chemical reaction. | Activation energy |
Attraction that holds oppositely-charged ions close together. | Ionic Bond |
Pure substance that contains two or more elements. | Compound |
Combination of chemical symbols and numbers that indicates which elements and how many atoms of each element are present in a molecule. | Chemical formula |
Substance that speeds up a chemical reaction but is not changed itself. | Catalyst |
Chemical bond formed when atoms share electrons. | Covalent Bond |
Substance that forms as a result of a chemical reaction. | Product |
Chemical reaction in which heat energy is released. | Exothermic Reaction |
Neutral particle formed when atoms share electrons. | Molecule |
Measure of how fast a chemical reaction occurs. | Rate of Reaction |
Process that produces chemical change, resulting in new substances that have properties different from those of the original substances. | Chemical reaction |
Atom that is no longer neutral because it has gained or lost an electron. | Ion |
Chemical symbol for an element, surrounded by as many dots as there are electrons in its outer energy level. | Electron dot diagram |
Bond resulting from the unequal sharing of electrons. | Polar Bond |
Substance that exists before a chemical reaction begins. | Reactant |
Substance that slows down a chemical reaction, making the formation of a certain amount of product take longer. | Inhibitor |
Force that holds two atoms together. | Chemical bond |
Shorthand form of writing what reactants are used and what products are formed in a chemical reaction. | Chemical Equation |
Region surrounding the nucleus of an atom, where electrons are most likely to be found. | Electron Cloud |
Chemical reaction in which heat energy is absorbed. | Endothermic Reaction |