| 释义 |
einsteinium Chem.|aɪnʃˈtaɪnɪəm, -st-|
[f. the name of Albert Einstein + -ium.]
An artifically produced radioactive element. Symbol Es. Atomic number 99. Atomic mass of isotope 253 (1967) 253·0847.
1955[see fermium]. 1958Times 29 Aug. 6/3 The following 10 [transuranic elements] were known..einsteinium (99), fermium (100). 1967New Scientist 6 July 22/2 Oak Ridge National Laboratory says it has succeeded in separating roughly one ten millionth of an ounce of einsteinium, the transuranic element first discovered in 1954. |