ocr: Formula H Weight He CE Li Be B - - CI N U F Ne 7 8 9 Na Mg Al Si P S C1 Ar 4 5 6 K Ca Sc Ti Y - Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 1 2 3 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe U % .H20 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg TI Pb Bi Po At Rn Fr Ra Ac Rf Ha Sg Ns Hs Mt D SLi Li Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 10B 12c Bc Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr ISN 10 180