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chapter 2
chapeter 2 study word
Term | Definition |
---|---|
pure substance | matter that always has exactly the same compositions |
element | is a substance that cannot be broken down into simpler substance |
atom | is the smallest particle of an element |
compound | is a substance that is made from two or more simpler substances and can be broken down into those similar substances |
homogeneous mixture | the substance are so evenly distributed that it is difficult to distinguish one substance in the mixture from another |
solution | a mixture that forms when substances dissolves and form a homogeneous mixture |
suspension | is a heterogeneous mixture that separates into layers over time |
colloid | contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension |
physical property | any characteristic of a matter that can be observed or measured without changing the composition of the substances in the material |
viscosity | the tendency of a liquid to keep from flowing resistance to flowing |
conductivity | a materials ability to allow heat to flow |
malleability | is the ability of a solid to be hammered without shattering |
melting point | the temperature at which a substance changes from a solid to a liquid |
boiling point | the temperature at which a substance boils |
filtration | is a process that separates materials based on the size of their particles |
distillation | is a process that separates the substances in solution based on their boiling points |
physical change | occurs when some of the properties of a material change,but the substances in the material remain the same |
chemical property | is any ability to produce a change in the composition of matter |
flammability | is a material's ability to burn in the presence of oxygen |
reactivity | the property that describes how readily a substance combines chemically with other substances |
chemical change | occurs when a substance reacts and forms one or more new substances |
precipitate | any solid that forms and separates from a liquid mixture |