noun. A mixture of butter and suger. A mixture of butter and suger. The definition of a mixture is a combination of different things, or the state or act of being mixed. 1  An example of a mixture is a bowl of butter, sugar and salt. 2  An example of mixture is the process of combining flour and baking soda.
deuterium oxide. An isotope of water in which hydrogen has been displaced by its isotope deuterium. Its properties differ from ordinary water in that it has higher freezing and boiling points and is incapable of supporting life.
Deuterium is a isotope of hydrogen which varies from hydrogen by one neutron normally hydrogen has only one proton, where as deuterium has one proton and one neutron. It has wide applications in fission reactors. The chemical symbol of deuterium is 2H and is denoted by  D .hese are hydrogen with zero neutrons, deuterium contains one neutron, and tritium contains two neutrons. Here we are discussing about the isotope of hydrogen that is deuterium which is known as heavy hydrogen. How this isotope is useful, what is its mass and other properties, letâs discuss about that.