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fiasKO [112]
3 years ago
6

Element X is a radioactive isotope such that every 11 years, its mass decreases by half. Given that the initial mass of a sample

of Element X is 60 grams, how much of the element would remain after 25 years, to the nearest whole number?
Mathematics
1 answer:
viva [34]3 years ago
4 0

Answer:

Ending Amount = beginning amount / 2^n  where "n" is the number of half-lives or elapsed time / half-life

For this problem "n" = 25 / 11 = 2.2727272727

Ending Amount = 60 grams / 2^2.2727272

Ending Amount = 60 / 4.832357534

Ending Amount = 12.4162998242 grams

Source: www.1728.org/halflife.htm

Step-by-step explanation:

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