Topic 1 Matter and Chemical Reactions Vocabulary 1-19

element

• a pure substance that contains one type of atom and cannot be broken down into a simpler substance

• a mixture of different types of atoms

• a compound made of two or more elements

• a substance that can be easily decomposed into simpler substances

neutral

• having a pH of 7 and not the characteristics of acids or bases

• having a pH less than 7 and exhibiting acidic properties

• having a pH greater than 7 and exhibiting basic properties

• having a pH of 7 and exhibiting both acidic and basic properties

compound

• a substance made of two or more chemical elements bonded to each other

• a mixture of different substances that can be separated

• a single element that cannot be broken down

• a solution where one substance is dissolved in another

base

• compound that has opposite properties to acids, is bitter, and feels slippery

• substance that increases the acidity of a solution

• a type of salt that is used in cooking

• a liquid that turns blue litmus paper red

periodic table

• chart that lists all the known chemical elements

• a type of chemical reaction

• a method for measuring temperature

• a collection of laboratory equipment

surface tension

• the tendency of liquid molecules to attract one another and contract to the smallest possible surface area

• the ability of a liquid to resist flow

• the force that causes liquids to evaporate

• the pressure exerted by a liquid on its container

homogeneous mixture

• a mixture in which the components are uniformly distributed throughout and where the composition of the mixture is the same throughout

• a mixture where the components are easily distinguishable and can be separated by physical means

• a mixture that contains two or more substances that are not evenly distributed

• a mixture that has a uniform composition but can be separated into its components by chemical means

yield

• To result in

• To produce a sound

• To give up

• To create a problem

reactants

• substances that react with each other to make something new

• substances that are produced as a result of a reaction

• substances that do not participate in a reaction

• substances that are used to speed up a reaction

heterogeneous mixture

• a mixture in which the components are uniform and identical in every sample

• a mixture in which the components are not uniform and where different samples from the mixture are not identical to each other

• a pure substance that cannot be separated into simpler substances

• a mixture that has a uniform composition throughout