H He Bulk elements Li Be Trace elements BCNOFNe 15161718 Na Mg Al Si P S CIAr K Ca Se Ti V Cr Mn Fe Co Ni Cu Zn GaGeAsSeBrKr 4241444546474849 Rb Sr Y Zr Nb Mo Te Ru Rh PdAgCdIn 757677787980818289 Cs Ba Hf Ta W Re Os Ir Pt Au Hg TI Pb Bi AtRn Lanthanides Fr R Actinides