单词 | lawrencium |
释义 | Word Frequency lawrencium(lɒˈrɛnsɪəm, lɔː-) noun a transuranic element artificially produced from californium. Symbol: Lr; atomic no: 103; half-life of most stable isotope,256Lr: 35 seconds; valency: 3 Word origin C20: named after Ernest Orlando Lawrence (1901–58), US physicist |
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