Lr (element kimik) Simboli kimik për lavrencium. (lawrencium) Sistemi Periodik i Elementeve Kimike H He LiBeBCNOFNe NaMgAlSiPSClAr KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe CsBa1»HfTaWReOsIrPtAuHgTiPbBiPoAtRn FrRa2»RfDbSgBhHsMtDsRgCnNhFlUupLvUusUuo 1»LaCePrNdPmSmEuGdTbDyHoErTmYbLu 2»AcThPaUNpPuAmCmBkCfEsFmMdNoLr Lexuar: 21