fermium /fer·mi·um/ (Fm) (fer´me-um) a chemical element, at. no. 100.
fermium (Fm)
fermium (Fm) [fer´me-um]
fer·mi·um (fûr m - m, f r-)n. Symbol Fm A synthetic radioactive metallic element whose most stable isotope is Fm 257 with a half-life of approximately 100 days. Atomic number 100. |
fermium (Fm)
[fur′mē·əm]
Etymology: Enrico Fermi, Italian physicist, 1901-1954
a synthetic transuranic metallic element. Its atomic number is 100; the mass of its longest-lived, best-known isotope is 257. Fermium was first detected in the debris from a hydrogen bomb explosion and later produced in a reactor.
fermium (Fm) [fer´me-um]
a chemical element, atomic number 100, atomic weight 253. (See Appendix 6.)
fermium
a chemical element, atomic number 100, atomic weight 253, symbol Fm. See Table 6.
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