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Origin of heavy water
Words nearby heavy water
Example sentences from the Web for heavy water
Now a complete list of your uranium-refining plants, your military reactors, heavy-water and heavy-hydrogen plants, and so on.The Galaxy Primes|Edward Elmer Smith
We've already informed the British, through channels, that the heavy-water menace no longer exists.
I managed to locate the house which was headquarters for the heavy-water dealers, again with the aid of an informant.
British Dictionary definitions for heavy water
Scientific definitions for heavy water
A Closer Look
The nucleus of most hydrogen atoms consists of a single proton, but in one isotope of hydrogen, called deuterium or heavy hydrogen, the nucleus also contains a neutron and thus weighs nearly twice as much as standard hydrogen. The substance called heavy water is chemically identical to ordinary water (H2O), except that the hydrogen atoms in the molecule are the deuterium isotopes (D2O). Heavy water makes up a small percentage (0.02%) of water naturally occurring on Earth. It is an excellent moderator for nuclear reactions, slowing down the fast neutrons produced in a nuclear fission reaction, increasing the likelihood that the neutrons will successfully collide with heavy nuclei to cause further fission. Although heavy water is chemically nearly identical with ordinary water, it is about ten percent heavier and interferes with cell mitosis if consumed in place of normal water. Ice cubes made of heavy water are denser than ordinary liquid water and will sink to the bottom of a glass of cola.
Cultural definitions for heavy water
Water with a higher average molecular weight than ordinary water. In a molecule of heavy water, the hydrogen atoms are isotopes in which the nuclei each contain a proton and a neutron, and hence are twice as heavy as a normal hydrogen atom.