In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is the half life of the radioactive material
A
0.75 days
B
2.58 days
C
4 days
D
4.80 days
E
6 days
Verified Correct Answer: D.
Physical Principles & Numerical Solution
64g → 32g → 16g → 8g → 4g → 2g
Half life time= 24/5 = 4.8 days
Source: Myschool Past Questions Archive (Record #26272)