A radioactive nucleus decays, with the activity shown in the graph above. The half-life of the nucleus is
A. 2 min
B. 7 min
C. 11 min
D. 18 min
E. 23 min
(GR9277 #26)
Solution:
From the graph: at t = 0, N ≈ 6 × 103
Half life, N½ = 3 × 103 → t = 7
Answer: B
No comments :
Post a Comment