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25 Cards in this Set
- Front
- Back
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Amorphous |
A type of solid matter in which atoms or molecules do not have long-range order (e.g. glass and plastic) |
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Atoms |
The smallest identifiable unit of an element |
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Chemical change |
A change in which matter changes its composition |
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Chemical properties` |
Properties that a substance can display only through changing its composition |
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Compound |
A substance composed of two or more elements in fixed, definite proportions |
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Compressible |
Able to occupy a smaller volume when subjected to increased pressure. Gases are compressible because, in the gas phase, atoms or molecules are widely seperated |
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Crystalline |
A type of solid matter with atoms or molecules arranged in a well-ordered, three-dimensional array with long-range, repeating order (e.g salt and diamond) |
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Decanting |
The process of seperating two immiscible (do not mix) components by carefully pouring off one component into another container. E.g. Oil and water |
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Distillation |
Separating mixures of miscible liquids, in which the mixture is heated to boil off the more volatile (the more easily vaporisable) liquid |
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Element |
A substance that cannot be broken down into simpler substances |
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Filtration |
A method of separating liquid and solid in which the mixture is poured through filter paper usually held in a funnel |
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Gas |
A state of matter in which atoms or molecules are widely separated and free to move relative to one another |
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Homogeneous mixture |
A mixture such as salt water, that has the same composition througout |
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Heterogeneous mixture |
A mixture, such as oil and water, that has two or more regions with different compositions |
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Liquid |
A state of matter in which atoms or molecules are packed close to each other (about as closely as in a solid) but are free to move around and by each other |
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Matter |
Anything that occupies space and has mass. Matter has three different states; solid, liquid and gas |
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Mixture |
A substance composed of two or more types of atoms or molecules combined in variable proportions |
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Molecule |
Two or more atoms joined in a specific arrangement by chemical bonds. A molecule is the smallest identifiable unit of a molecular compound |
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Physical change |
A change in which matter does not change its composition, even though its appearance might change |
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Physical properties |
Those properties that a substance displays without changing its composition |
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Properties |
The characteristics we use to distinguish one substance from another |
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Pure substance |
A substance composed of only one type of atom or molecule |
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Solid |
A state of matter in which atoms or molecules are packed close to each other in fixed locations |
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State of matter |
The three form of which matter can exist; solid, liquid and gas |
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Volatile |
Tending to vaporise easily |
