Periodic Table
Periodic Table


IDAtomic NumberNameSymbolAtomic MassGroupPeriods
6161PromethiumPm[145]6
6262SamariumSm150.36(2)6
6363EvropyumEu151.964(1)6
6464GadoliniumGd157.25(3)6
6565TerbiumTb158.92535(2)6
6666DisprosiumDy162.500(1)6
6767HolmiumHo164.930 32(2)6
6868ErbiumEr167.259(3)6
6969ThuliumTm168.93421(2)6
7070YtterbiumYb173.04(3)6
7171LutetiumLu174.967(1)36
7272HafniumHf178.49(2)46
7373TantalumTa180.94788(2)56
7474Tungsten ( Wolfram )W183.84(1)66
7575RheniumRe186.207(1)76
7676OsmiumOs190.23(3)86
7777IridiumIr192.217(3)96
7878PlatinumPt195.084(9)106
7979Gold ( Aurum )Au196.966569(4)116
8080Mercury (Hydrargyrum)Hg200.59(2)126
8181ThalliumTl204.3833(2)136
8282Lead ( Plumbum )Pb207.2(1)146
8383BismuthBi208.98040(1)156
8484PoloniumPo[210]166
8585AstaturAt[210]176
8686RadonRn[220]186
8787FranciumFr[223]17
8888RadiumRa[226]27
8989ActiniumAc[227]7
9091ProtactiniumPa231.03588(2)7

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