Uranium-238 decays very slowly.its half-life is 4.47 billion years.
what percentage of a sample of uranium-238 will remain after 13.4 billion years?
i have to test after 3 !
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Ответ:
Ответ:
12.53 % of a sample of Uranium-238 will remain after 13.4 billion years.
Explanation:
The half life of the uranium-238 =
=4.47 billion years
All the radioactive reaction are of first order kinetics. The rate constant and t half of the reaction are related as:
where,
k = rate constant =![0.1550 (\text{billion years})^{-1}](/tpl/images/0201/2772/2cc17.png)
t = time taken during radio decay = 4.47 billion years
[A] = amount left left after time t.
12.53 % of a sample of Uranium-238 will remain after 13.4 billion years.
Ответ:
B
Explanation:
A cation is a positively charged in. If an atom gives away an election, which is negatively charged, that would make it more positively charged, thus a cation.