Tabla Periódica de los Elementos Químicos 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 1 H 1,00794 2 He 4,00260 2 3 Li 6,941 4 Be 9,01218 5 B 10,811 6 C 12,0107 7 N 14,0067 8 O 15,9994 9 F 18,9984 10 Ne 20,1797 3 11 Na 22,9897 12 Mg 24,305 13 Al 26,9815 14 Si 28,0855 15 P 30,9737 16 S 32,065 17 Cl 35,453 18 Ar 39,948 4 19 K 39,0983 20 Ca 40,078 21 Sc 44,9559 22 Ti 47,867 23 V 50,9415 24 Cr 51,9961 25 Mn 54,9380 26 Fe 55,845 27 Co 58,9331 28 Ni 58,6934 29 Cu 63,546 30 Zn 65,38 31 Ga 69,723 32 Ge 72,63 33 As 74,9216 34 Se 78,96 35 Br 79,904 36 Kr 83,798 5 37 Rb 85,4678 38 Sr 87,62 39 Y 88,9058 40 Zr 91,224 41 Nb 92,9063 42 Mo 95,96 43 Tc (98) 44 Ru 101,07 45 Rh 102,905 46 Pd 106,42 47 Ag 107,868 48 Cd 112,411 49 In 114,818 50 Sn 118,71 51 Sb 121,76 52 Te 127,6 53 I 126,904 54 Xe 131,293 6 55 Cs 132,905 56 Ba 137,327 57-71 72 Hf 178,49 73 Ta 180,947 74 W 183,84 75 Re 186,207 76 Os 190,23 77 Ir 192,217 78 Pt 195,084 79 Au 196,966 80 Hg 200,59 81 Tl 204,383 82 Pb 207,2 83 Bi 208,980 84 Po (209) 85 At (210) 86 Rn (222) 7 87 Fr (223) 88 Ra (226) 89-103 104 Rf (267) 105 Db (268) 106 Sg (271) 107 Bh (272) 108 Hs (270) 109 Mt (276) 110 Ds (281) 111 Rg (280) 112 Cn (285) 113 Uut (284) 114 Fl (289) 115 Uup (288) 116 Lv (293) 117 Uus (294) 118 Uuo (294) 57 La 138,905 58 Ce 140,116 59 Pr 140,907 60 Nd 144,242 61 Pm (145) 62 Sm 150,36 63 Eu 151,964 64 Gd 157,25 65 Tb 158,925 66 Dy 162,5 67 Ho 164,930 68 Er 167,259 69 Tm 168,934 70 Yb 173,054 71 Lu 174,966 89 Ac (227) 90 Th 232,038 91 Pa 231,035 92 U 238,028 93 Np (237) 94 Pu (244) 95 Am (243) 96 Cm (247) 97 Bk (247) 98 Cf (251) 99 Es (252) 100 Fm (257) 101 Md (258) 102 No (259) 103 Lr (262)