释义 |
per·iod·ic acid \|pər.]ˌī|ädik-, |per]\ noun Etymology: International Scientific Vocabulary per- + iodic : any of a series of strongly oxidizing acids that are the highest oxygen acids of iodine and may be regarded as derived from a hypothetical iodine heptoxide I2O7 by union with varying amounts of water: as a. : a hygroscopic crystalline acid H5IO6 obtainable by electrolytic oxidation of iodic acid — called also orthoperiodic acid, paraperiodic acid b. : an unstable acid HIO4 that forms stable salts and is obtained as a white residue by dehydration of orthoperiodic acid by heat — called also metaperiodic acid |