U has various meanings in the Chemistry category. Discover the full forms, definitions, and usage contexts of U in Chemistry.
A code meaning "information not available. An unidentified target. An aircraft or ship that has not been determined to be hostile, friendly, or neutral using identification friend or foe and other techniques, but that must be tracked by air defense or naval engagement systems.
ChemistryA white malleable metal which is softer than steel. Its specific gravity is 18.7, it melts at a temperature of 2,400°C. Symbol:"U" Atomic Number:"92" Atomic Mass: 238.03amu. Uranium is one of the elements in the actinide series of inner transition elements. It may also be classified as a rare earth element. A very radioactive metal that can be found in nuclear facilities, weapons, and submarines.
Chemistryone millionth of a unit (e.g., microsievert is 10-6 Sv).
ChemistryCoefficient describing the total resistance to heat loss from a producing pipe to its surroundings. Includes heat loss by conduction, convection and radiation.
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