Question

The half-life of a radioactive nuclide is 20 hrs. The fraction of the original activity that will remain after 40 hrs is ______.

Options

• 1/8

• 1/2

• 1/4

• 1/6

Answer 1

The half-life of a radioactive nuclide is 20 hrs. The fraction of the original activity that will remain after 40 hrs is 1/4.