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

Correct Answer:

Option D – 4.80 days

Explanation

64g → 32g → 16g → 8g → 4g → 2g

Half life time= 24/5 = 4.8 days