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Capítulo 15: Masas atómicas

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TablaCapítulo15.1: Masas atómicas
Número atómico, Z Nombre Número de masa atómica, A Símbolo Masa atómica (u) Porcentaje de abundancia o modo de decaimiento Vida media, t 1/2
0 neutrones 1 n 1.008 665 β 10.37 min
1 Hidrógeno 1 1H 1.007 825 99.985%  
  Deuterio 2 2H or D 2.014 102 0.015%  
  Tritio 3 3H or T 3.016 050 β 12.33 y
2 Helio 3 3He 3.016 030 1.38×104%  
    4 4He 4.002 603 100%  
3 Litio 6 6Li 6.015 121 7.5%  
    7 7Li 7.016 003 92.5%  
4 Berilio 7 7Be 7.016 928 EC 53.29 d
    9 9Be 9.012 182 100%  
5 Boro 10 10 B 10.012 937 19.9%  
    11 11 B 11.009 305 80,1%  
6 Carbono 11 11C 11.011 432 CE,β+  
    12 12C 12.000 000 98.90%  
    13 13C 13.003 355 1.10%  
    14 14C 14.003 241 β 5730 y
7 Nitrógeno 13 13 N 13.005 738 β+ 9.96 min
    14 14 N 14.003 074 99.63%  
    15 15 N 15.000 108 0.37%  
8 Oxígeno 15 15O 15.003 065 CE,β+ 122 s
    16 16O 15.994 915 99.76%  
    18 18O 17.999 160 0.200%  
9 Flúor 18 18 F 18.000 937 CE,β+ 1.83 h
    19 19 F 18.998 403 100%  
10 Neón 20 20Ne 19.992 435 90.51%  
    22 22Ne 21.991 383 9.22%  
11 Sodio 22 22Na 21.994 434 β+ 2.602 y
    23 23Na 22.989 767 100%  
    24 24Na 23.990 961 β 14.96 h
12 Magnesio 24 24Mg 23.985 042 78.99%  
13 Aluminio 27 27Al 26.981 539 100%  
14 Silicio 28 28Si 27.976 927 92.23% 2.62h
    31 31Si 30.975 362 β  
15 Fosforo 31 31P 30.973 762 100%  
    32 32P 31.973 907 β 14.28 d
16 Azufre 32 32S 31.972 070 95.02%  
    35 35S 34.969 031 β 87.4 d
17 Cloro 35 { }^{35} \mathrm{Cl} 34.968 852 75.77%  
    37 { }^{37} \mathrm{Cl} 36.965 903 24.23%  
18 Argón 40 { }^{40} \mathrm{Ar} 39.962 384 99.60%  
19 Potasio 39 { }^{39} \mathrm{~K} 38.963 707 93.26%  
    40 { }^{40} \mathrm{~K} 39.963 999 0.0117%, CE,\beta^{-} 1.28 \times 10^{9} \mathrm{y}
20 Calcio 40 { }^{40} \mathrm{Ca} 39.962 591 96.94%  
21 Scandium 45 { }^{45} \mathrm{Sc} 44.955 910 100%  
22 Titanio 48 { }^{48} \mathrm{Ti} 47.947 947 73.8%  
23 Vanadio 51 { }^{51} \mathrm{~V} 50.943 962 99.75%  
24 Cromo 52 { }^{52} \mathrm{Cr} 51.940 509 83.79%  
25 Manganeso 55 { }^{55} \mathrm{Mn} 54.938 047 100%  
26 Hierro 56 { }^{56} \mathrm{Fe} 55.934 939 91.72%  
27 Cobalto 59 { }^{59} \mathrm{Co} 58.933 198 100%  
    60 { }^{60} \mathrm{Co} 59.933 819 \beta^{-} 5.271 y
28 Níquel 58 { }^{58} \mathrm{Ni} 57.935 346 68.27%  
    60 60 \mathrm{Ni} 59.930 788 26.10%  
29 Cobre 63 { }^{63} \mathrm{Cu} 62.939 598 69.17%  
    65 { }^{65} \mathrm{Cu} 64.927 793 30.83%  
30 Zinc 64 { }^{64} \mathrm{Zn} 63.929 145 48.6%  
    66 { }^{66} \mathrm{Zn} 65.926 034 27.9%  
31 Galio 69 { }^{69} \mathrm{Ga} 68.925 580 60,1%  
32 Germanio 72 { }^{72} \mathrm{Ge} 71.922 079 27.4%  
    74 { }^{74} \mathrm{Ge} 73.921 177 36.5%  
33 Arsénico 75 { }^{75} \mathrm{As} 74.921 594 100%  
34 Selenio 80 { }^{80} \mathrm{Se} 79.916 520 49.7%  
35 Bromo 79 { }^{79} \mathrm{Br} 78.918 336 50.69%  
36 Krypton 84 { }^{84} \mathrm{Kr} 83.911 507 57.0%  
37 Rubidio 85 { }^{85} \mathrm{Rb} 84.911 794 72.17%  
38 Estroncio 86 { }^{86} \mathrm{Sr} 85.909 267 9.86%  
    88 { }^{88} \mathrm{Sr} 87.905 619 82.58%  
    90 { }^{90} \mathrm{Sr} 89.907 738 \beta^{-} 28.8 y
39 Itrio 89 { }^{89} \mathrm{Y} 88.905 849 100%  
    90 { }^{90} \mathrm{Y} 89.907 152 \beta^{-} 64.1 h
40 Circonio 90 { }^{90} \mathrm{Zr} 89.904 703 51.45%  
41 Niobio 93 { }^{93} \mathrm{Nb} 92.906 377 100%  
42 Molibdeno 98 { }^{98} \mathrm{Mo} 97.905 406 24.13%  
43 Tecnecio 98 { }^{98} \mathrm{Tc} 97.907 215 \beta^{-} 4.2 \times 10^{6} \mathrm{y}
44 Rutenio 102 { }^{102} \mathrm{Ru} 101.904 348 31.6%  
45 Rhodium 103 { }^{103} \mathrm{Rh} 102.905 500 100%  
46 Paladio 106 { }^{106} \mathrm{Pd} 105.903 478 27.33%  
47 Plata 107 { }^{107} \mathrm{Ag} 106.905 092 51.84%  
    109 { }^{109} \mathrm{Ag} 108.904 757 48.16%  
48 Cadmio 114 { }^{114} \mathrm{Cd} 113.903 357 28.73%  
49 Indio 115 { }^{115} \mathrm{In} 114.903 880 95.7%,\beta^{-} 4.4 \times 10^{14} \mathrm{y}
50 Estaño 120 { }^{120} \mathrm{Sn} 119.902 200 32.59%  
51 Antimonio 121 { }^{121} \mathrm{Sb} 120.903 821 57.3%  
52 Telurio 130 { }^{130} \mathrm{Te} 129.906 229 33.8%,\beta^{-} 2.5 \times 10^{21} \mathrm{y}
53 Yodo 127 { }^{127} \mathrm{I} 126.904 473 100%  
    131 { }^{131} \mathrm{I} 130.906 114 \beta^{-} 8.040 d
54 Xenon 132 { }^{132} \mathrm{Xe} 131.904 144 26.9%  
    136 { }^{136} \mathrm{Xe} 135.907 214 8.9%  
55 Cesio 133 { }^{133} \mathrm{Cs} 132.905 429 100%  
    134 { }^{134} \mathrm{Cs} 133.906 696 CE,\beta^{-} 2.06 y
56 Bario 137 { }^{137} \mathrm{Ba} 136.905 812 11.23%  
    138 { }^{138} \mathrm{Ba} 137.905 232 71.70%  
57 Lantano 139 { }^{139} \mathrm{La} 138.906 346 99.91%  
58 Cerio 140 { }^{140} \mathrm{Ce} 139.905 433 88.48%  
59 Praseodimio 141 { }^{141} \mathrm{Pr} 140.907 647 100%  
60 Neodimio 142 { }^{142} \mathrm{Nd} 141.907 719 27.13%  
61 Prometio 145 { }^{145} \mathrm{Pm} 144.912 743 CE,\alpha 17.7 y
62 Samario 152 { }^{152} \mathrm{Sm} 151.919 729 26.7%  
63 Europio 153 { }^{153} \mathrm{Eu} 152.921 225 52.2%  
64 Gadolinio 158 { }^{158} \mathrm{Gd} 157.924 099 24.84%  
65 Terbio 159 { }^{159} \mathrm{Tb} 158.925 342 100%  
66 Disprosio 164 { }^{164} \mathrm{Dy} 163.929 171 28.2%  
67 Holmio 165 { }^{165} \mathrm{Ho} 164.930 319 100%  
68 Erbio 166 { }^{166} \mathrm{Er} 165.930 290 33.6%  
69 Tulio 169 { }^{169} \mathrm{Tm} 168.934 212 100%  
70 Iterbio 174 { }^{174} \mathrm{Yb} 173.938 859 31.8%  
71 Lutecio 175 { }^{175} \mathrm{Lu} 174.940 770 97.41%  
72 Hafnio 180 { }^{180} \mathrm{Hf} 179.946 545 35.10%  
73 Tantalio 181 { }^{181} \mathrm{Ta} 180.947 992 99.98%  
74 Tungsteno 184 { }^{184} \mathrm{W} 183.950 928 30.67%  
75 renio 187 { }^{187} \mathrm{Re} 186.955 744 62.6%,\beta^{-} 4.6 \times 10^{10} \mathrm{y}
76 Osmio 191 { }^{191} \mathrm{Os} 190.960 920 \beta^{-} 15.4 d
    192 { }^{192} \mathrm{Os} 191.961 467 41.0%  
77 Iridio 191 { }^{191} \mathrm{Ir} 190.960 584 37.3%  
    193 { }^{193} \mathrm{Ir} 192.962 917 62.7%  
78 Platino 195 { }^{195} \mathrm{Pt} 194.964 766 33.8%  
79 Oro 197 { }^{197} \mathrm{Au} 196.966 543 100%  
    198 { }^{198} \mathrm{Au} 197.968 217 \beta^{-} 2.696 d
80 Mercurio 199 { }^{199} \mathrm{Hg} 198.968 253 16.87%  
    202 { }^{202} \mathrm{Hg} 201.970 617 29.86%  
81 Talio 205 { }^{205} \mathrm{Tl} 204.974 401 70.48%  
82 Plomo 206 { }^{206} \mathrm{Pb} 205.974 440 24.1%  
    207 { }^{207} \mathrm{Pb} 206.975 872 22.1%  
    208 { }^{208} \mathrm{Pb} 207.976 627 52.4%  
    210 { }^{210} \mathrm{Pb} 209.984 163 \alpha, \beta^{-} 22.3 y
    211 { }^{211} \mathrm{Pb} 210.988 735 \beta^{-} 36.1 min
    212 { }^{212} \mathrm{Pb} 211.991 871 \beta^{-} 10.64 h
83 Bismuto 209 { }^{209} \mathrm{Bi} 208.980 374 100%  
    211 { }^{211} \mathrm{Bi} 210.987 255 \alpha, \beta^{-} 2.14 min
84 Polonio 210 { }^{210} \mathrm{Po} 209.982 848 \alpha 138.38 d
85 Asatino 218 { }^{218} \mathrm{At} 218.008 684 \alpha, \beta^{-} 1.6 s
86 Radón 222 { }^{222} \mathrm{Rn} 222.017 570 \alpha 3.82 d
87 Francium 223 { }^{223} \mathrm{Fr} 223.019 733 \alpha, \beta^{-} 21.8 min
88 Radio 226 { }^{226} \mathrm{Ra} 226.025 402 \alpha 1.60 \times 10^{3} \mathrm{y}
89 Actinium 227 { }^{227} \mathrm{Ac} 227.027 750 \alpha, \beta^{-} 21.8 y
90 Torio 228 { }^{228} \mathrm{Th} 228.028 715 \alpha 1.91 y
    232 { }^{232} \mathrm{Th} 232.038 054 100%,\alpha 1.41 \times 10^{10} \mathrm{y}
91 Protactinio 231 { }^{231} \mathrm{~Pa} 231.035 880 \alpha 3.28 \times 10^{4} \mathrm{y}
92 Uranio 233 { }^{233} \mathrm{U} 233.039 628 \alpha 1.59 \times 10^{3} \mathrm{y}
    235 { }^{235} \mathrm{U} 235.043 924 0.720%,\alpha 7.04 \times 10^{8} \mathrm{y}
    236 { }^{236} \mathrm{U} 236.045 562 \alpha 2.34 \times 10^{7} \mathrm{y}
    238 { }^{238} \mathrm{U} 238.050 784 99.2745%,\alpha 4.47 \times 10^{9} \mathrm{y}
    239 { }^{239} \mathrm{U} 239.054 289 \beta^{-} 23.5 min
93 Neptunio 239 { }^{239} \mathrm{Np} 239.052 933 \beta^{-} 2.355 d
94 Plutonio 239 { }^{239} \mathrm{Pu} 239.052 157 \alpha 2.41 \times 10^{4} \mathrm{y}
95 Americio 243 { }^{243} \mathrm{Am} 243.061 375 \alpha, fisión 7.37 \times 10^{3} \mathrm{y}
96 Curium 245 { }^{245} \mathrm{Cm} 245.065 483 \alpha 8.50 \times 10^{3} \mathrm{y}
97 Berkelio 247 { }^{247} \mathrm{Bk} 247.070 300 \alpha 1.38 \times 10^{3} \mathrm{y}
98 Californium 249 { }^{249} \mathrm{Cf} 249.074 844 \alpha 351 y
99 Einsteinium 254 { }^{254} \mathrm{Es} 254.088 019 \alpha, \beta^{-} 276 d
100 Fermio 253 { }^{253} \mathrm{Fm} 253.085 173 CE,\alpha 3.00 d
101 Mendelevium 255 { }^{255} \mathrm{Md} 255.091 081 CE,\alpha 27 min
102 Nobelium 255 { }^{255} \mathrm{No} 255.093 260 CE,\alpha 3.1 min
103 Lawrencium 257 { }^{257} \mathrm{Lr} 257.099 480 CE,\alpha 0.646 s
104 Rutherfordium 261 { }^{261} \mathrm{Rf} 261.108 690 \alpha 1.08 min
105 Dubnium 262 { }^{262} \mathrm{Db} 262.113 760 \alpha, fisión 34 s
106 Seaborgium 263 { }^{263} \mathrm{Sg} 263.11 86 \alpha, fisión 0.8 s
107 Bohrium 262 { }^{262} \mathrm{Bh} 262.123 1 \alpha 0.102 s
108 Hassium 264 { }^{264} \mathrm{Hs} 264.128 5 \alpha 0.08 ms
109 Meitnerium 266 { }^{266} \mathrm{Mt} 266.137 8 \alpha 3.4 ms

This page titled Capítulo 15: Masas atómicas is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by OpenStax.

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