Question 646: Atoms & Nuclei

Question

Half life of a radioactive element is 12.5 hour and its quantity is 256 g. After how much time its quantity will remain 1 g?

Accepted Answer

N = N
0
$${\left( {{1 \over 2}} \right)^n}$$
$$ \Rightarrow $$ 1 = 256$${\left( {{1 \over 2}} \right)^n}$$
$$ \Rightarrow $$ n = 8
Time for 8 half life = 100 hours

Answer

50 hrs

Answer

100 hrs

Answer

150 hrs

Answer

200 hrs

Atoms & Nuclei

Half life of a radioactive element is 12.5 hour and its quantity is 256 g. After how much time its quantity will remain 1 g?

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