Answer:
8 years.
Explanation:
Given data:
Half life of radioactive material = 8 years
Time taken to decay half amount = ?
Solution:
If the half life of an radioactive material is 8 years it means half of its amount will decay in 8 years.
Consider that the original amount of material is 100 g.
At time zero = 100 g
At 1st half life = 100 g/2 = 50 g
Number of half life = T elapsed / Half life
1 = T elapsed / 8 years
1 × 8 years = T elapsed
T elapsed = 8 years
SO after 8 years its amount would be remain half.
