Atoms And Nuclei Question 360

Question: Half-lives for α and β emission of a radioactive material are 16 years and 48 years respectively. When material decays giving α and β emission simultaneously, time in which 3/4th material decays is

Options:

A) 29 years

B) 24 years

C) 64 years

D) 12 years

Show Answer

Answer:

Correct Answer: B

Solution:

  • Effective half life is calculated as 1T=1T1+1T2 1T=116+148T=12 years Time in which 34 will decay is 2 half-lives = 24 years


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