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VMS8Chapter19+20

vocab

QuestionAnswer
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
Created by: bwise
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