Atoms And Nuclei Question 402
Question: A radioactive nucleus A with a half-life T, decays into a nucleus B. At there is no nucleus B. At some time t, the ratio of the number of B to that of A is 0.3. Then, t is given by
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: D
Solution:
- Let initially there are total
number of nuclei At time
As we know
or