Nt 1 / 0 H He 2 / 2 Li Be B C N O F __ 7 / 8 Na Mg Al Si P S Cl Ar 8 / 8 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga __ As __ __ __ 14 / 18 Rb Sr Y __ Nb Mo __ __ __ Pd Ag Cd In Sn Sb Te __ Rn 13 / 18 Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu __ Ta W __ Os Ir Pt Au Hg __ Pb Bi __ __ __ 26 / 32 __ __ __ Th __ U __ Pu Am __ __ __ __ .. .. .. .. .. .. .. .. .. .. .. .. .. ?? .. ?? .. ?? ?? 4 / 28 1+74 / 114 __ Unimplemented in GT .. Not occuring naturaly ?? Not proven to exist