The naturally occurring A 4n decay series begins with 232 Th and eventually ends on 208 Pb (see Figure 11 18) A particular rock is measured to contain 4 11 g of 232 Th and 0 88 g of 208 Pb Compute the age of the rock Figure 11 18 N 140 135 130 125 Thorium series (4n) 212pb 208 TI 80 218po B B a 220Rn a 212Bi a 228 Ra B208Pb 224 Ra 212po 85 Z B 232Th a 228 AC B a 228 Th 90

Question: The naturally occurring A = 4n decay series begins with 232 Th and eventually ends on 208 Pb (see Figure 11-18). A particular rock is

The naturally occurring A = 4n decay series begins with ²³²Th and eventually ends on ²⁰⁸Pb (see Figure 11-18). A particular rock is measured to contain 4.11 g of ²³²Th and 0.88 g of ²⁰⁸Pb. Compute the age of the rock.

Figure 11-18

N 140 135 130 125 Thorium series (4n) 212pb 208 TI 80

N 140 135 130 125 Thorium series (4n) 212pb 208 TI 80 218po B B a 220Rn a 212Bi a 228 Ra B208Pb 224 Ra / 212po 85 Z B 232Th a 228 AC B a 228 Th 90

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