click below
click below
Normal Size Small Size show me how
unit 6 science vocab
study for test friday
Term | Definition |
---|---|
chemical equation | description of a reaction using element symbols and chemical formulas |
chemical reaction | process in which atoms of on or more substances rearrange to form one or more new substances |
coefficient | number placed in front of an element symbol or chemical formula in an equation |
law of conservation of mass | states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction |
product | new substance produced by a chemical reaction |
reactant | starting substance in a chemical reaction |
combustion | chemical reaction in which a substance combines with oxygen and releases energy |
decomposition | chemical reaction in which one compound breaks down and forms two or more substances |
double replacement | describes a reaction in which the negative ions in two compounds switch places, forming two new compounds |
single replacement | describes a reaction in which one element replaces another element in a compound |
synthesis | chemical reaction in which two or more substances combine and form one compound |
endothermic | chemical reactions that absorb thermal energy |
exothermic | chemical reactions that release thermal energy |
acid | substance that produces a hydronium (H30+) when dissolved in water |
base | substance that produces hydroxide ions (OH-) when dissolved in water |
pH scale | a scale used to measure how acidic or base a solution is (ranges from 1-4) |