100Fm
Fermium
페르뮴 · フェルミウム
Actinide
Atomic number100
ElementFm — Fermium
Atomic mass257
CategoryActinide
Group3
Period7
Electron config[Rn] 5f12 7s2
Shells2,8,18,32,30,8,2
State (RT)Solid
Melting ptNo data
Boiling ptNo data
Electronegativity1.3
Discovered1953
Main usesResearch only
2 · 8 · 18 · 32 · 30 · 8 · 2
Group 3
Sc ScandiumY YttriumLa LanthanumCe CeriumPr PraseodymiumNd NeodymiumPm PromethiumSm SamariumEu EuropiumGd GadoliniumTb TerbiumDy DysprosiumHo HolmiumEr ErbiumTm ThuliumYb YtterbiumLu LutetiumAc ActiniumTh ThoriumPa ProtactiniumU UraniumNp NeptuniumPu PlutoniumAm AmericiumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumMd MendeleviumNo NobeliumLr Lawrencium