Show Metallic Lead Evidence has hns recently been discovered discovered ered which points toward the existence nc of at at least two kinds of metallic l lead dECry d. d Every Cry sample of ordinary lead sways always has hns erectly the same sume atomic weight I as every other sample but lead lend from radioactive minerals lead which I seems to have come from the decomposition decomposition position of ot radium radium has has neither the I same Bame atomic weight nor the same same density den sity sUy as us ordinary lead lend although In inmany many properties Including their spectra they seem to be identical w |