Essentials of Chemistry Flashcards
The basic unite of matter.
Atom
A change that occurs when one or more substances change into entirely new substances with different properties.
Chemical Change
A characteristic of a pure substance that describes its ability to change into different substances with different properties.
Chemical Property
A substance made up of atoms of two or more different elements joined by chemical bonds.
Compound
A state of matter with no definite shape or volume
Gas
A mixture that is not uniform in composition; components are evenly distributed and not easily distinguished.
Heterogeneous Mixture
A mixture that is uniform in composition; components are evenly distributed and not easily distinguished.
Homogeneous Mixture
A state of matter that has no definite shape but has a definite volume.
Liquid
A combination of two or more substances that are not chemically combined.
Mixture
Two or more atoms held together by covalent bonds.
Molecule
A change in a substance that does not involve a change in the identity of the substance.
Physical Change
A characteristic of a pure substance that can be observed without changing it into another substance.
Physical property
A solid that forms from a solution during a chemical reaction.
Precipitate
A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
Pure Substance
A form of matter that has a definite shape and definite volume.
Solid
