kilogram

kilogram

The kilogram (kg) is the base unit of mass in the SI system of units. The standard kilogram is a 1 kg corrosion resistant platinum/iridium cylinder, carefully preserved in the suburbs of Paris (with a backup copy kept in Gaithersburg, Maryland.) Efforts are underway to replace these artifacts by redefining the kilogram as the mass of a certain number of silicon atoms.

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อุตสาหกรรม/ขอบเขต: Chemistry
Category: General chemistry
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kilogram (kg)

Aerospace; Space flight

The SI base unit of mass, based on the mass of a metal cylinder kept in France. See also g (gram).

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Chemistry; General chemistry

A branch of chemistry that studies chemical phenomena from a physical and mathematical perspective. Physical chemistry includes chemical thermodynamics, kinetics, spectroscopy, ...

itrium

Chemistry; General chemistry

Element 39, atomic weight 88.90585, a dark gray metal that is used in alloys and nuclear technology for its high neutron transparency. Yttrium compounds are used in the ...

spontan

Chemistry; General chemistry

A spontaneous process occurs because of internal forces; no external forces are required to keep the process going, although external forces may be required to get the process ...

stabilizator

Chemistry; General chemistry

A substance that makes a mixture more stable. Antioxidants and antiozonants are examples of stabilizers; stabilizers are added to paints to prevent the components of the mixture ...