1.

Heavy water is a _____________, which slows down fast moving neutrons to thermal velocitiesso that they can cause fission of uranium nuclei.​

Answer»

Answer:

HEAVY water (D2O), ALSO called deuterium oxide

Explanation:

water COMPOSED of deuterium, the hydrogen isotope with a mass double that of ordinary hydrogen, and oxygen. (Ordinary water has a COMPOSITION represented by H2O.)



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