Question
Question: The half life of <sup>198</sup>Au is 2.7 days. The probability that any <sup>198</sup>Au nucleus wil...
The half life of 198Au is 2.7 days. The probability that any 198Au nucleus will decay in one second is-
A
10–6
B
3 × 10–6
C
5 × 10–6
D
10–5
Answer
3 × 10–6
Explanation
Solution
Decay probability per second is just the decay constant
l = = 2.7 days 0.693
l = 2.7×24×60×600.693
l = 2.97 × 10–6/sec