H 1 Li 3 Na 11 K 19 Rb 37 Cs 55 Fr 87 Be 4 Mg 12 Ca 20 Sr 38 Ba 56 Ra 88 Sc 21 Y 39 Ti 22 Zr 40 Hf 72 Rf 104 V 23 Nb 41 Ta 73 Db 105 Cr 24 Mo 42 W 74 Sg 106 Mn 25 Tc 43 Re 75 Bh 106 Fe 26 Ru 44 Os 76 Hs 107 Co 27 Rh 45 Ir 77 Ni 28 Pd 46 Pt 78 Cu 29 Ag 47 Au 79 Zn 30 Cd 48 Hg 80 Cn 112 B 5 Al 13 Ga 31 In 49 Tl 81 Uut 113 C 6 Si 14 Ge 32 Sn 50 Pb 82 Fl 114 N 7 P 15 As 33 Sb 51 Bi 83 Uup 115 O 8 S 16 Se 34 Te 52 Po 84 Lv 116 F 9 CL 17 Br 35 I 53 At 85 Uus 117 He 2 Ne 10 Ar 18 Kr 36 Xe 54 Rn 86 Uuo 118