which definition describes a half - life?\nthe time required for half of a radioactive sample to decay.\nthe…

which definition describes a half - life?\nthe time required for half of a radioactive sample to decay.\nthe time required for half of a radioactive sample to become unstable.\nthe time required for all of a radioactive sample to change because of heat.\nthe time required for all of a sample to break down due to pressure change.

which definition describes a half - life?\nthe time required for half of a radioactive sample to decay.\nthe time required for half of a radioactive sample to become unstable.\nthe time required for all of a radioactive sample to change because of heat.\nthe time required for all of a sample to break down due to pressure change.

Answer

Brief Explanations:

Half - life is a well - known concept in nuclear science. It specifically refers to the time it takes for half of a radioactive sample to decay through radioactive processes. Becoming unstable is not the correct description as radioactive substances are already unstable. Changes due to heat or pressure change are not related to the definition of half - life.

Answer:

The time required for half of a radioactive sample to decay.