Question

The half life of a radioactive element is 20 days. How many days will it take for the radioactive sample to decay to 1/8 its size?

Answer 1

Answer: 40 days

Explanation: The substance completely disintegrates in 20 days the substance completely disintegrates in 40 days 1/8 part of the mass of the substance will be left intact at the end of 40 days.