Vocabulary
1. __________________________: A quality of a substance that never changes and can be used to
identify the substance.
A characteristic property is a chemical or physical property that helps identify and classify substances.
The characteristic properties of a substance are always the same whether the sample one is observing is
large or small
2. ___________________________: the temperature at which a substance changes from a liquid
to a gas
The temperature at which a liquid boils and turns to vapor
3. ____________________: the temperature at which a substance changes from a solid to a liquid
The temperature at which a given solid will melt
4. ___________________________: a change in a substance that does not change its identity; for
example, a change of state.
- A change from one state (solid or liquid or gas) to another without a change in chemical composition
5. ___________________________: a characteristic property of substance that
indicates it ability to undergo a specific chemical change
6. ________________________: a change in which on or more substances combine or break apart
to form new substances.
Chemical change is any change that results in the formation of new chemical substances. At the
molecular level, chemical change involves making or breaking of bonds between atoms. These changes
are chemical: iron rusting (iron oxide forms
7. ____________________: Two or more substances that are mixed together but not chemically
combined
A product of mixing.
Any combination or blend of different elements, kinds, qualities, etc.:
Chemistry, Physics. An aggregate of two or more substances that are not chemically united and that
exist in no fixed proportion to each other
Solution: a very well-mixed mixture
8. ________________: a substance made of only on kind of matter and having definite properties
A pure substance is a sample of matter with both definite and constant composition with distinct
chemical properties
9. ___________________: a substance that cannot be broken down into other substances by
chemical or physical means.
each of more than one hundred substances that cannot be chemically interconverted or broken down
into simpler substances and are primary constituents of matter. Each element is distinguished by its
atomic number, i.e., the number of protons in the nuclei of its atoms.
10. ___________________: a substance made of two or more elements chemically combined
A thing that is composed of two or more separate elements; a mixture.
A substance formed from two or more elements chemically united in fixed proportions.