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General chemistry
Industry: Chemistry
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General chemistry
Natural gas
Chemistry; General chemistry
A mixture of methane and other gases, found trapped over petroleum deposits under the earth.
Theoretical yield
Chemistry; General chemistry
The amount of product obtained when all of the limiting reagent reacts.
Alkali metal
Chemistry; General chemistry
The Group 1 elements, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr) react with cold water for form strongly alkaline hydroxide solutions, and are referred to ...
Element
Chemistry; General chemistry
An element is a substance composed of atoms with identical atomic number . The older definition of element (an element is a pure substance that can't be decomposed chemically) was made obsolete by ...
Needle valve
Chemistry; General chemistry
A valve which allows fine control over the rate of gas or liquid flowing through it. The valve contains a thin needle with a point that fits into a conical cup. When the valve is closed, the needle ...
Theory
Chemistry; General chemistry
Theories are well-established explanations for experimental data. To become established, the theory must experimentally tested by many different investigators. Theories usually can not be proven; a ...
Element symbol
Chemistry; General chemistry
An international abbreviation for element names, usually consisting of the first one or two distinctive letters in element name. Some symbols are abbreviations for ancient names.
