Answer:
50g
Explanation:
The half - life of a radioactive material is the time taken for half of a material to decay by half or into half.
The faster the half life the faster the rate of this decay and vice versa.
Now if initially we have 100g of a Technetium - 99;
If the half - life is 8hrs, at every 8 hours, the mass of technetium will decay by half;
So; at 16hrs, the mass of the material will be 50g
