Transcription of H He Pt
1 American Chemical (223)Radium(226)Rutherfordium(265)Dubniu m(268)Seaborgium(271)Bohrium(270) (98) (277)Meitnerium(276)Darmstadtium(281)Roe ntgenium(280) (284)Flerovium(289)Moscovium(288)Livermo rium(293) (209) (294)Oganesson(294)Astatine(210)Radon(22 2) (227) (237)Plutonium(244)Americium(243)Curium( 247)Berkelium(247)Californium(251)Einste inium(252)Fermium(257)Mendelevium(258)No belium(259)Lawrencium(262)Copernicium(28 5)Pr omethium(145) GasesLanthanidesActinidesAlkali MetalsAlkaline Earth MetalsOther MetalsMetalloidsTransition NumberSymbolNameAverage Atomic Mass1 PERIOD123456723456710891113121415181716