67Ho
Holmium
홀뮴 · ホルミウム
Lanthanide
Atomic number67
ElementHo — Holmium
Atomic mass164.93
CategoryLanthanide
Group3
Period6
Electron config[Xe] 4f11 6s2
Shells2,8,18,29,8,2
State (RT)Solid
Melting pt1474°C
Boiling pt2700°C
Electronegativity1.23
Discovered1878
Main usesHigh-power magnets, lasers
2 · 8 · 18 · 29 · 8 · 2
Group 3
Sc ScandiumY YttriumLa LanthanumCe CeriumPr PraseodymiumNd NeodymiumPm PromethiumSm SamariumEu EuropiumGd GadoliniumTb TerbiumDy DysprosiumEr ErbiumTm ThuliumYb YtterbiumLu LutetiumAc ActiniumTh ThoriumPa ProtactiniumU UraniumNp NeptuniumPu PlutoniumAm AmericiumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumFm FermiumMd MendeleviumNo NobeliumLr Lawrencium