Question

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

• A. 0.1
• B. 0.2
• C. 0.3
• D. 2.3

Answer 1

Answer: (C)

0.3

Answer 2

$\lambda = \frac{0.693}{T_{1/2}} = \frac{0.693}{2.3} = 0.3$