click below
click below
Normal Size Small Size show me how
Science
Question | Answer |
---|---|
what is a substance in which the atoms of two or more elements are combined in a fixed proportion | compound |
substances that prevent certain chemical reactions are called | inhibitors |
a substance that speeds up a chemical reaction without undergoing a permanent change itself is an what? | catalyst |
a chemical reaction in which two or more substance combine to form another substance is a what kind of reaction? | synthesis |
the breaking down of a substance into tow or more substances is a what? | decomposition |
according to the law of conservation of mass, how does the mass of the products in a chemical equation compare with the mass of the reactants? | the masses are equal |
what is an insoluble solid that forms as the result of a double displacement reaction called | a precipitate |
what is a mixture that has the same composition, color, and density throughout? | a solution |
adding more solute to a solvent does what to the solvent? | raises its boiling point |
what would increase the solubility of a gas in a liquid | increase the pressure. decrease the temperature |
a dilute solution has a ....... of solute in the solvent | small amount |
one commonly used precise way to describe concentrations of solutions is to state | the percentage by volume of the solute |
the maximum amount of a solute that can be dissolved in a given amount of solvent is its | solubility |
the type of radioactive particle that can be stopped by a sheet of paper is the | alpha particle |
the most penetrating type of radiation is the | gamma rays |
a helium nucleus with two protons and two neutrons is called a | alpha particle |
protons in the nucleus are attracted to each other by | the strong force |
the process of nuclear decay is known as | radioactivity |
negatively charged particles emitted from a nucleus at a high speed are | beta particles |
the process by which nuclei haiving low masses are united to form nuclei having low masses are united to form nuclei with a larger mass is | nuclear fusion |
both a fusion reaction a fission reaction do what when their together? | produce energy |