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Heavy water (deuterium oxide (2H 2O) or D 2O) is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2H or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (1H or H, also called protium) that makes up most of the hydrogen in regular water.
Deutsch. Deuterium (also known as heavy hydrogen, or heavy water) is a hydrogen atom with an additional neutron and is very well suited as fuel for ships because of the high energy yield and easy ignition of the Deuterium-Deuterium and Deuterium-Tritium fusion reactions.rancais. FranÃ§ais. Deutsch (deuterium also known as heavy, hydrogen or heavy) water is a hydrogen atom with an additional neutron and is very well suited as fuel for ships because of the high energy yield and easy ignition of The-Deuterium deuterium And-Deuterium tritium fusion. reactions