The uranium series described in Figure 25-2 is also known as the “4n + 2” series because the mass number of each nuclide in the series can be expressed by the equation A = 4n + 2, where n is an integer. Show that this equation is indeed applicable to the uranium series.

Figure 25-2

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Mass number 238 234 230 226 222 218 214 210 206 I 80 Hg Tl 1 84 82 Pb Pb Bi Po 86 At Rn Fr Atomic number 1 88 90 92 Ra Ac Th Pa U E