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Dovator [93]
3 years ago
6

The half-lives for the radioactive decay of various elements are listed in the table below.

Geography
1 answer:
lbvjy [14]3 years ago
4 0

Answer:

See solution and explanation below

Explanation:

a) From;

N/No = (1/2)^t/t1/2

1/8 = (1/2)^t/1.25 * 10^9

(1/2)^3 =  (1/2)^t/1.25 * 10^9

3 = t/1.25 * 10^9

t = 3 * 1.25  * 10^9

t = 3.75 * 10^9 years

b)

N/No = (1/2)^40,110/5,730

N/No = (1/2)^7

N/No = 1/128

percentage remaining after 40,110 years = 1/128 * 100 = 0.78%

c) N/200 * 10^-9 = (1/2)^4.26 * 10^9/0.710 * 10^9

N/200 * 10^-9 = (1/2)^6

N/200 * 10^-9 = 1/64

64 N = 200 * 10^-9

N= 3.125 * 10^-9 g

d) Radiocarbon dating can not be used to determine the age of the solar system since the solar system is as old as the universe and was formed billions of years ago. Radiocarbon dating can only be accurately used to obtain the age of objects of plant or animal origin between 1000 - 10000 years old.

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