Assertion: deuterium | /r/HasProperty | concentrated in the residue
Facets:
Source sentences:
text: Deuterium was first prepared in pure form by the electrolytic method of concentration: when a water solution of an electrolyte, such as sodium hydroxide, is electrolyzed, the hydrogen formed at the cathode contains a smaller fraction of deuterium than the water, and thus deuterium is concentrated in the residue.