Heavy water is a form of water that contains only deuterium rather than the common hydrogen-1 isotope that makes up most of the hydrogen in normal water.
Heavy water is water that contains heavy hydrogen - also known as deuterium - in place of regular hydrogen. It can also be written as 2H2O or D2O. Deuterium is different than the hydrogen that usually occurs in water—known as protium, since each atom of deuterium contains a proton and a neutron, while more commonly occurring hydrogen contains only a proton.
Heavy water does occur naturally, however in much smaller quantities than regular water. Approximately, one water molecule for every twenty million water molecules is heavy water. Since deuterium is a stable isotope, heavy water is not radioactive.
In addition to being useful for nuclear reactors, heavy water has also been used in Canada to detect neutrinos from the sun at the Sudbury Neutrino Observatory, providing important insights to subatomic physics.
Molar mass: 20.0276 g/mol
Boiling point: 101.4 °C
IUPAC ID: [2H]2-water
Melting point: 3.8 °C
Density: 1.11 g/cm³
#heavywater #water #D2O
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