Question

If half-life of a radioactive atom is 2.3 days, then its decay constant would be:

• A. 0.2
• B. 0.1
• C. 2.3
• D. 0.3

Answer 1

Answer: (D)

Given: half-life of radioactive atom is = 2.3 days Then decay constant is $\lambda =\frac{0.693}{T_{1/2}}=\frac{0.693}{2.3}=0.3$