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Chemistry Unit 1 Def

Definitions for Unit 1 Chemistry

Gas A fluid form of matter that fills the container it occupies.
Liquid A fluid form of matter that has a well defined surface and will occupy the lowest part of a container.
Solid A form of matter that remains independent in shape despite the container its held in, it's particles are tightly packed together.
Atoms The building blocks of all substances. It is the defining structure of an element and cannot be broken down by chemical means.
Elements Made up of only one type of atom.
Compounds Consist of two or more types of elements(atoms) that are chemically joined together, the result of a chemical reaction.
Mixture Consists of two or more substances mixed together but are not chemically bonded, can be easily separated.
Diatomic Made of two or more atoms chemically bonded together.
Homogeneous Mixture Mixture where all the components are uniformly distributed throughout, the composition of the mixture is the same throughout.
Heterogeneous Mixture Mixture where the components are not uniformly distributed, two samples of this mixture will not be identical.
Dissolving When a substance is broken up or absorbed by another substance.
Solution A substance where a solute has dissolved into a solvent.
Solvent Liquid in which a solute dissolves.
Solute Substance that dissolves in a solvent to form a solution.
Soluble Describes a substance that will dissolve.
Insoluble Describes a substance that will not dissolve.
Phase A physical distinctive form of matter (gas, solid, liquid)
Phase Change A change in the form of matter e.g. when a substance goes from solid phase to liquid phase.
Melting The process by which a substance changes from a solid phase to a liquid phase.
Condensation The process by which a substance changes from a gas phase to a liquid phase.
Vapourization The process by which a substance changes from a liquid phase to a gas phase.
Sublimation The process by which a substance changes from a solid phase to a gas phase.
Deposition The process by which a substance changes from a gas phase to a solid phase.
Freezing Point The temperature at which a liquid changes to a solid
Created by: deannarose1



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