### deuterium

• n. [核] 氘；[核] 重氢
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deuterium 氘，重氢

deuter-, 二，词源同two. 因这种物理元素其质量为氢的两倍而得名。比较tritium.

deuterium (n.)
1933, coined by U.S. chemist Harold C. Urey, with Modern Latin ending + Greek deuterion, neuter of deuterios "having second place," from deuteros "next, second," according to some sources from duo (see two), but according to Watkins the ground sense is "missing" and the Greek word is from PIE from *deu-tero-, suffixed form of root *deu- "to lack, be wanting." So called because it is twice the mass of hydrogen.
1. More reactive are the heavier isotopes of hydrogen, deuterium and tritium.

2. To produce deuterium requires an environment of high energy.

3. The rings are opened with hydrogen chloride and deuterium chloride.

4. Deuterium is widely used in the study of reaction mechanisms and in spectroscopic studies.

5. The substituent is deuterium.