95Am
Americium
아메리슘 · アメリシウム
Actinide
Atomic number95
ElementAm — Americium
Atomic mass243
CategoryActinide
Group3
Period7
Electron config[Rn] 5f7 7s2
Shells2,8,18,32,25,8,2
State (RT)Solid
Melting pt1176°C
Boiling pt2011°C
Electronegativity1.3
Discovered1944
Main usesSmoke detectors
2 · 8 · 18 · 32 · 25 · 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 PlutoniumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumFm FermiumMd MendeleviumNo NobeliumLr Lawrencium