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水素化
Wikipedia definition
1. Helium hydride ionThe hydrohelium(1+) cation, HeH, also known as the helium hydride ion, is a positively charged ion formed by the reaction of a proton with a helium atom in the gas phase, first observed in 1925. It is the strongest known acid, with a proton affinity of 177.8 kJ/mol. This ion is also called helium-hydride molecular ion. It has been suggested that it should occur naturally in the interstellar medium. It is the simplest heteronuclear ion, and is comparable with the hydrogen molecular ion, H2.
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