Chemical Property - A characteristic or behavior of a substance that may be observed when it undergoes a chemical change or reaction., Chemical Change - A change that occurs when two or more substances combine to form a new substance; new substances have new properties, Valence Electrons - The electrons in the outermost energy level of an atom., Precipitate - The solid that forms when combining two liquids., Electrolysis - Chemical decomposition produced by passing an electric current through a liquid or solution containing ions., Corrode - Destroy or damage (metal, stone, or other materials) slowly by chemical action., Tarnish - No longer shiny., Conservation of Mass - Mass is not created or destroyed, but rearranged, Chemical Equation - A way of writing changes in the arrangement of atoms during a chemical reaction, using chemical symbols., Product - The final material or substance left at the completion of a series of reactions., Reactants - Elements and compounds that are present at the beginning of a chemical reaction., Coefficients - The big number in front of the chemical formula that indicates how many molecules are in the chemical formula., Subscripts - The small number that is placed behind and slightly below a chemical formula. Subscripts indicate how many atoms are present in a chemical formula., Oxidation - the loss of electrons by an atom, ion, or molecule; gaining oxygen; losing hydrogen, Combustion - a chemical process of rapid reaction between a substance (the fuel) and an oxidant (usually oxygen) that produces heat and light, Neutralization - reaction between an acid and a base, where they react to form a salt and water, Acid - donates a proton (H+ ion) or accepts a pair of electrons; have a pH less than 7, sour taste, turn blue litmus paper red, and produce hydrogen gas when reacted with certain metals, Base - accepts protons, donates electrons, or releases hydroxide ions (OH-) when dissolved in water; pH greater than 7, taste bitter, feel slippery to the touch, and turn red litmus paper blue,

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