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| physical substance; anything that takes up space |
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| The basic unit of a chemical element |
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A property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed:
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The tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.
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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. |
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of or denoting a process involving substances in different
phases (solid, liquid, or
gaseous). |
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The decimal measuring system based on the meter, liter,
and gram as units of
length, capacity, and weight or mass. |
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The changing of a liquid into a gas, often under the influence of
heat (as in the boiling of water). |
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| a substance made by mixing other substances together. |
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| any property that is measurable whose value describes a state of a physical system. The changes in thephysical properties of a system can be used to describe its transformations or evolutions between its momentary states. often referred to as observables. |
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| the degree of compactness of a substance. |
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| the tendency of matter to change in volume in response to a change in temperature, through heat transfer. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, the kinetic energy of its molecules increases. |
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a thing that is composed of two or more separate elements;
a mixture
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water that collects as droplets on a cold surface when
humid air is in contact with it. |
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| a particular kind of matter with uniform properties. |
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the state of being thick, sticky, and semifluid in consistency,
due to internal friction. |
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