Heavy Water

Water that contains 2H, rather than 1H. Heavy water is about 11% denser than ordinary water. The neutron in the deuterium nucleus allows this type of water to slow, or moderate, neutrons from fissioning uranium, permitting a sustained chain-reaction in reactors using natural uranium as fuel.


Symbol
D2O

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Atomic / Molecular Weight 20.0276 gmol-1Clip
Density 1110 kgm-3Clip
Melting Point 276.8 KClip
Boiling Point 374 KClip
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See also: Deuterium, Hydrogen, Water.

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Subjects: Chemistry