Definitions for Unit 1 Chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Gas | A fluid form of matter that fills the container it occupies.
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| Liquid | A fluid form of matter that has a well defined surface and will occupy the lowest part of a container.
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| Solid | A form of matter that remains independent in shape despite the container its held in, it's particles are tightly packed together.
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| Atoms | The building blocks of all substances. It is the defining structure of an element and cannot be broken down by chemical means.
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| Elements | Made up of only one type of atom.
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| Compounds | Consist of two or more types of elements(atoms) that are chemically joined together, the result of a chemical reaction.
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| Mixture | Consists of two or more substances mixed together but are not chemically bonded, can be easily separated.
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| Diatomic | Made of two or more atoms chemically bonded together.
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| Homogeneous Mixture | Mixture where all the components are uniformly distributed throughout, the composition of the mixture is the same throughout.
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| Heterogeneous Mixture | Mixture where the components are not uniformly distributed, two samples of this mixture will not be identical.
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| Dissolving | When a substance is broken up or absorbed by another substance.
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| Solution | A substance where a solute has dissolved into a solvent.
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| Solvent | Liquid in which a solute dissolves.
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| Solute | Substance that dissolves in a solvent to form a solution.
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| Soluble | Describes a substance that will dissolve.
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| Insoluble | Describes a substance that will not dissolve.
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| Phase | A physical distinctive form of matter (gas, solid, liquid)
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| Phase Change | A change in the form of matter e.g. when a substance goes from solid phase to liquid phase.
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| Melting | The process by which a substance changes from a solid phase to a liquid phase.
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| Condensation | The process by which a substance changes from a gas phase to a liquid phase.
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| Vapourization | The process by which a substance changes from a liquid phase to a gas phase.
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| Sublimation | The process by which a substance changes from a solid phase to a gas phase.
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| Deposition | The process by which a substance changes from a gas phase to a solid phase.
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| Freezing Point | The temperature at which a liquid changes to a solid
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