| 释义 |
deuterium Chem.|djuːˈtɪərɪəm|
[mod.L., f. Gr. δεύτερ-ος second + -ium.]
One of the isotopes of hydrogen, differing from the commonest isotope in having a neutron as well as a proton in the nucleus and present to about 1 part in 6000 in naturally occurring hydrogen (elemental and combined); also called heavy hydrogen. Symbols 2H (also H2), D.
1933H. C. Urey et al. in Jrnl. Chem. Physics I. 513/1 We wish to propose that the names for the H1 and H2 isotopes be protium and deuterium. 1934Times Educ. Suppl. 18 Aug. p. i/2 The newly discovered ‘heavy water’ or deuterium oxide in Antarctic snow. 1935Discovery June 179/2 ‘Heavy water’..is rich in deuterium, the hydrogen isotope of mass 2. 1958Engineering 31 Jan. 134/3 The deuterium or heavy-hydrogen content of seawater is calculated to be sufficient to sustain present energy consumption for a thousand million years. |