Glossary of Chemical Terms - S
- A compound, C7H5NO3S, that is several hundred times sweeter than can sugar and is used as a calorie-free sweetener.
- An ionic compound with a positive ion that comes from a base and a negative ion that comes from an acid.
- Silica is the common name for silicon dioxide, SiO2.It exists in nature as crystalline quartz.
- A fog containing fumes, or a photochemical haze caused by the action of ultraviolet radiation on hydrocarbons and NOx from automobile exhaust.
- A liquid colloidal dispersion; a fluid colloidal system in which solid particles are dispersed in a liquid colloidal solution.
- The maximum amount of a substance that will dissolve in a given amount of solvent at a given temperature.
- The substance dissolved in a solution; substance present in a lesser amount in a solution.
- A homogeneous mixture of two or more substances.
- The substance present in the largest amount in a solution; often the liquid component.
- An instrument for measuring the emission or absorption of light of a particular wavelength.
- The science that deals with the use of the spectroscope and with spectrum analysis.A spectroscope is an optical device for producing and observing a spectrum of light or radiation from any source.
- The spin of an electron is designated by ms, the electron spin quantum number, which can have values of +1/2 and -1/2.In the presence of an external magnetic field an electron in an orbital can have one of two possible energy states, which depend on whether the magnetic field associated with the electron is aligned with or against the external magnetic field.
- The spatial arrangement of atoms in molecules or compounds and the relation of spatial arrangement to the substanceis properties.
- Two or more compounds with the same molecular formula and the same atom-to-atom arrangement, but with different arrangement of atoms in space. stereoisomeric (adjective)
- Compounds containing a 17-carbon, four-ring system.
- The study of the quantitative relationships between reactants and products.
- The layer of the earth's atmosphere that extends from roughly 7 miles (11 km) above the surface to 31 miles (50 km) above the surface.
- The direct conversion of a solid to a gas.
- An atom or group that replaces another atom or group in a molecule.
- A state in which the electrical resistance of a material is so low that it cannot be measured and appears to be zero.The superconducting state is also characterized by unusual magnetic properties.
- Above the critical point; above critical temperature or pressure.
- supersaturated solution
- A solution that temporarily contains more solute than the saturated amount at some temperature.
- surface tension
- The energy required to disrupt the surface of a liquid.
Glossary created by David Shaw (Madison Area Technical College) for The Chemistry Place.
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