Question

A radioactive material has a half-life of 3 hours. If there are originally 10 milligrams of the radioactive material, how many milligrams will be left after 6 hours?

Answer 1

2.5mg

Explanation:

Since the half-life for the radioactive material is 3 hours, Therefore it will undergone two times of half-life process.

The first 3 hours 10mg will be decreased into 5mg. The final 3 hrs, it will decreased from 5mg to 2.5mg