例句與造句

1. The ratio of deuterium to normal hydrogen was found to vary from compound to compound, which astronomers believe suggests that cometary ices were formed in interstellar clouds, rather than in the solar nebula.
2. H 2 O . Chemically, there are differences in bond energy and length for compounds of heavy hydrogen isotopes compared to normal hydrogen, which are larger than the isotopic differences in any other element.
3. The test apparatus cost a pittance and centered on palladium rods in a jar of heavy water, in which normal hydrogen is replaced by deuterium, an isotope of hydrogen that is ubiquitous in sea water.
4. If the antihydrogen doesn't behave the same as normal hydrogen " the textbooks would have to be rewritten, " said Hangst, who is a physicist at the University of Aarhus in Denmark, along with his CERN work.
5. Briefly, replacing normal hydrogen ( protons ) by deuterium within a molecule causes the molecular vibrational frequency of X-H ( for example C-H, N-H and O-H ) bonds to decrease, which leads to a decrease in vibrational zero-point energy.
6. It's difficult to find normal hydrogen in a sentence. 用normal hydrogen造句挺難的
7. Deuterium can replace the normal hydrogen in water molecules to form heavy water ( D 2 O ), which is about 10.6 % denser than normal water ( so that ice made from it sinks in ordinary water ).
8. Any system or environment that accepts electrons from a normal hydrogen electrode is a half cell that is defined as having a positive redox potential; any system donating electrons to the hydrogen electrode is defined as having a negative redox potential.
9. Its properties are somewhat distinct from the rest of the hydrogen chalcogenides, since polonium is a metal while the other chalcogens are not, and hence this compound is intermediate between a normal hydrogen chalcogenide or hydrogen halide such as hydrogen chloride, and a metal hydride like stannane.
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