| 单词 | lawrencium |
| 释义 | lawrencium Symbol Lr. A radioactive metallic transuranic element belonging to the actinoids; a.n. 103; mass number of only known isotope 257 (half-life 8 seconds). The element was identified by A. Ghiorso and associates in 1961. It is named after the US physicist E. O. Lawrence (1901–58). The alternative name unniltrium has been proposed |
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